Chapter Five

ECOLOGY

The Living City and the More-Than-Human World

Residential Ecology — Living spaces integrated with nature, where the more-than-human world thrives alongside human civilization. Editorial illustration • Hamilton 2092

Hamilton 2092 is not a city set against nature; it is a city embedded within it. The urban environment is an ecosystem—complex, dynamic, teeming with life in forms visible and invisible. From the microorganisms in the soil to the peregrine falcons nesting on the old steel mills, from the mycelium networks beneath the streets to the monarch butterflies passing through on migration, the city is alive.

This chapter will guide you through the ecological systems of Hamilton 2092: the habitats and species that share the urban space, the networks of remediation and restoration that heal past damage, and the practices of living well within the more-than-human community.

To understand the ecology of Hamilton 2092, you must first understand its bioregional context—the natural systems within which the city is embedded.

Hamilton sits at the western end of Lake Ontario, one of the five Great Lakes that contain approximately twenty percent of the world's surface freshwater (Great Lakes Commission, 2026). The lake shapes the city's climate, provides its drinking water, and supports a rich aquatic ecosystem.

The lake's influence: Lake Ontario moderates Hamilton's climate, keeping winters milder and summers cooler than inland areas. The lake effect brings increased precipitation, especially in winter when cold air passes over the warmer water.

The harbor: Hamilton Harbor is a natural bay at the western end of the lake, connected to the lake by a ship canal. The harbor is the city's aquatic heart, supporting fish, birds, and human activity.

Watershed connections: The city sits within the Lake Ontario watershed, with all its creeks and streams eventually flowing to the lake. This watershed connection shapes the city's hydrology and ecology.

The Niagara Escarpment bisects the city, a 100-meter cliff face of dolostone that runs from New York through Ontario to Wisconsin. The escarpment is a UNESCO World Biosphere Reserve, recognized for its unique ecology and geological significance.

Geology: The escarpment is the remnant of an ancient seabed, with exposed rock faces that support unique plant communities and provide nesting sites for birds.

Ecology: The escarpment supports forests of maple, beech, and oak, with understory plants adapted to the rocky, nutrient-poor soils. It is a critical wildlife corridor, connecting habitats across the region.

Climate: The escarpment creates distinct microclimates, with cooler conditions at its base and warmer conditions on the brow. These microclimates support diverse plant communities and create varied habitats.

Hamilton sits at the northern edge of the Carolinian Zone, a region of eastern North America characterized by deciduous forests and a relatively mild climate. The Carolinian Zone supports a high diversity of plant and animal species, many at the northern limit of their range.

Forest communities: The natural vegetation of the area is mixed deciduous forest, dominated by maple, beech, oak, hickory, and ash, with a diverse understory of wildflowers, shrubs, and ferns.

Species diversity: The Carolinian Zone supports more tree species than any other forest region in Canada, as well as numerous species of birds, mammals, reptiles, amphibians, and insects.

Conservation importance: Because much of the Carolinian Zone has been converted to agriculture and urban development, remaining natural areas are critical for conservation.

Within the bioregional context, Hamilton 2092 contains a mosaic of urban ecosystems—habitats created and maintained by the city's design.

The urban forest is the network of trees that grows throughout the city, in streets, parks, yards, and natural areas. It is one of the city's most important ecological assets.

Tree cover: Hamilton 2092 maintains over 40% tree cover, one of the highest rates for a city of its size (Nowak & Greenfield, 2020). This cover provides habitat, filters air, moderates temperature, manages stormwater, and supports human well-being.

Species diversity: The urban forest includes over 100 tree species, from native maples and oaks to introduced species that have naturalized. Diversity provides resilience against pests and diseases.

Age structure: The forest includes trees of all ages, from seedlings to ancient specimens. Old trees are particularly valuable for the habitat they provide.

Management: The urban forest is managed by the Stewardship Council, with neighborhood groups participating in planting, care, and monitoring.

The creek systems that drain into the harbor form riparian corridors—linear habitats that follow the watercourses through the city.

Daylighted creeks: Many creeks that were buried in pipes during the industrial era have been daylighted—brought back to the surface and restored as living waterways.

Habitat value: Riparian corridors provide critical habitat for aquatic and semi-aquatic species, as well as travel corridors for terrestrial wildlife.

Stormwater management: The corridors manage stormwater, slowing runoff and allowing infiltration, reducing flooding and recharging groundwater.

Recreation: The corridors provide recreational opportunities, with trails following the creek systems through the city.

Wetlands and ponds are distributed throughout the city, providing habitat for aquatic species and supporting water quality.

Remediation wetlands: Wetlands around the harbor were created as part of the harbor cleanup, using plants and microorganisms to filter pollutants from the water.

Stormwater ponds: Ponds throughout the city capture and treat stormwater, preventing pollution of creeks and the harbor.

Habitat ponds: Natural and created ponds provide habitat for amphibians, waterfowl, and aquatic invertebrates.

Buildings in Hamilton 2092 incorporate green roofs and living walls, creating vertical and horizontal habitat in the built environment.

Green roofs: Roofs planted with vegetation provide insulation, manage stormwater, and create habitat for insects and birds.

Living walls: Vertical gardens on building walls provide similar benefits and create striking visual features.

Habitat value: These features extend habitat into the three-dimensional urban environment, supporting species that can use vertical space.

Beneath the visible surfaces, the soil ecosystem is the foundation of urban ecology.

Soil life: A teaspoon of healthy soil contains billions of microorganisms—bacteria, fungi, protozoa, nematodes—along with insects, worms, and other invertebrates (Pimentel et al., 1995). This life is essential for nutrient cycling, water infiltration, and plant health.

Mycelial networks: Fungi in the soil form mycelial networks that connect plants, allowing the exchange of nutrients and information. These networks are the "wood wide web" that underlies the urban forest.

Soil restoration: Much of the city's soil was contaminated during the industrial era. Extensive remediation has restored soil health, though some areas remain under management.

Ecological Living — Residential spaces harmonized with natural systems, where built environment and ecosystem co-evolve. Editorial illustration • Hamilton 2092

Hamilton 2092 is home to thousands of species, from the microscopic to the magnificent. This section introduces some of the city's notable inhabitants.

Over 300 species of birds have been recorded in Hamilton, with more than 100 breeding in the city.

Resident species: Year-round residents include chickadees, cardinals, woodpeckers, crows, and ravens. These species have adapted to urban life and thrive in the city's habitats.

Migrants: Hamilton lies on major migration routes, and millions of birds pass through each spring and fall. The escarpment and harbor are particularly important stopover sites.

Raptors: The escarpment supports nesting peregrine falcons, red-tailed hawks, and Cooper's hawks. These predators help control populations of pigeons and other urban birds.

Waterfowl: The harbor and wetlands support ducks, geese, swans, grebes, and other waterfowl, including several species that nest in the city.

Species of concern: Several bird species in Hamilton are of conservation concern, including the chimney swift, the common nighthawk, and the wood thrush. The city has programs to protect and enhance habitat for these species.

Despite the urban environment, Hamilton supports a surprising diversity of mammals.

Small mammals: Squirrels, chipmunks, rabbits, and various mice and voles are common throughout the city. These species thrive in the urban forest and gardens.

Bats: Several species of bats roost in buildings and trees, emerging at dusk to feed on insects. Bats are valued for their pest control services and are protected.

Coyotes: Coyotes have adapted well to urban life, living in ravines and green spaces and hunting rodents and other prey. They are generally wary of humans but can be seen at dawn and dusk.

Deer: White-tailed deer are common in the escarpment areas and occasionally venture into residential neighborhoods, where they may browse gardens.

Other species: Raccoons, skunks, opossums, foxes, and even the occasional mink or weasel can be found in the city. Beavers have returned to some creek systems, creating wetlands with their dams.

The harbor and creek systems support diverse aquatic life.

The harbor fishery: The harbor supports populations of bass, walleye, perch, and other fish species. A recreational fishery is permitted, with consumption advisories for some species due to lingering contaminants.

Creek fish: The daylighted creeks support fish communities, with species including minnows, dace, and, in some streams, trout.

Salmon: After decades of restoration, salmon have returned to Hamilton's creeks, swimming up from the lake to spawn in the fall. This return is celebrated as a major ecological achievement.

Aquatic invertebrates: The water bodies support diverse communities of insects, crustaceans, mollusks, and other invertebrates, forming the base of the aquatic food web.

Invertebrates are the most diverse and abundant animals in the city, though often overlooked.

Pollinators: Bees, butterflies, moths, and other pollinators are essential to the city's food system and ecosystems. The city has extensive programs to support pollinator habitat.

Monarch butterflies: Hamilton lies on the monarch migration route, and thousands of monarchs pass through each fall, gathering at the escarpment before crossing the lake (Brower et al., 2012).

Fireflies: Fireflies light up the city's parks and gardens on summer evenings, their bioluminescent displays a magical feature of urban nights.

Dragonflies: These aerial predators are common near water, hunting mosquitoes and other insects.

Soil invertebrates: Earthworms, insects, and other invertebrates in the soil are essential for soil health and nutrient cycling.

The plant communities of Hamilton 2092 include native species, naturalized exotics, and cultivated varieties.

Native trees: Maple, oak, beech, hickory, ash, birch, and cherry are among the native trees that dominate the urban forest.

Native wildflowers: Spring wildflowers—trilliums, bloodroot, hepatica, spring beauty—carpet the forest floor before the trees leaf out. Summer brings milkweeds, asters, goldenrods, and many other species.

Invasive species: Some non-native plants have become invasive, outcompeting native species and disrupting ecosystems. The city has ongoing programs to manage invasive species while recognizing that some naturalized species have become part of the urban ecosystem.

Cultivated plants: Gardens, farms, and green roofs include a vast diversity of cultivated plants, from food crops to ornamental species.

The ecology of Hamilton 2092 is the result of decades of intentional work to remediate past damage and restore ecological function.

The most dramatic remediation achievement is the cleanup of Hamilton Harbor, once one of the most polluted bodies of water in North America.

Historical pollution: A century of industrial activity left the harbor contaminated with heavy metals, PCBs, PAHs, and other toxic substances. The harbor was declared an Area of Concern under the Great Lakes Water Quality Agreement.

Remediation efforts: Extensive remediation included dredging contaminated sediments, capping remaining contamination, controlling pollution sources, and creating wetlands to filter runoff.

Ecological restoration: Fish and wildlife habitats were created, native species were reintroduced, and the food web was rebuilt.

Results: The harbor has been removed from the Areas of Concern list. Fish populations have recovered, water quality has improved dramatically, and the harbor is now swimmable for much of the year (Environment and Climate Change Canada, 2026; Hamilton Harbour Remedial Action Plan, 2026).

The creek systems of Hamilton have been transformed from polluted drains to living waterways.

Daylighting: Buried creeks were brought back to the surface, with streams recreated in natural channels.

Riparian restoration: Stream banks were replanted with native vegetation, creating habitat and stabilizing channels.

Barrier removal: Dams and culverts that blocked fish passage were removed or modified, allowing fish to access upstream habitat.

Stormwater management: Green infrastructure throughout the watershed reduces runoff and improves water quality.

Contaminated soils from the industrial era have been remediated through various techniques.

Excavation: Highly contaminated soils were excavated and treated off-site.

Phytoremediation: Plants were used to extract or stabilize contaminants in place.

Bioremediation: Microorganisms were used to break down organic contaminants.

Capping: Contaminated soils were capped with clean soil or impermeable barriers to prevent exposure.

New habitat has been created throughout the city to support wildlife.

Wetlands: Wetlands have been created for stormwater management, water treatment, and wildlife habitat.

Prairie restoration: Old industrial lands have been restored to prairie, supporting pollinators and grassland birds.

Forest restoration: Degraded forests have been restored through planting and natural regeneration.

Nest boxes: Artificial nest structures support birds and bats that require cavities.

Daily life in Hamilton 2092 involves constant interaction with the more-than-human world. This section offers guidance for living well within this community of diverse beings.

The first step in living well with other species is to pay attention to them—to observe, learn, and understand their lives.

Naturalist practice: Many Hamiltonians practice natural history, keeping records of the species they encounter, learning to identify plants and animals, and understanding their behaviors and needs.

Citizen science: The city supports citizen science programs that engage residents in monitoring wildlife, tracking phenology (the timing of seasonal events), and contributing to ecological research.

Traditional knowledge: Indigenous knowledge of local species and ecosystems is integrated into education and management, recognizing the deep understanding that comes from generations of observation.

Technology: The mesh network includes tools for identifying species, reporting sightings, and accessing information about the urban ecosystem.

Living with wildlife requires practices that minimize conflict and support mutual flourishing.

Securing attractants: Food waste, compost, and pet food can attract wildlife. Proper containment reduces unwanted encounters.

Garden design: Gardens can be designed to coexist with wildlife—using native plants that support pollinators, creating habitat features, and accepting some level of herbivory as the cost of sharing space.

Pet management: Pets, especially cats, can have significant impacts on wildlife. Responsible pet management—including keeping cats indoors or in enclosed outdoor spaces—protects both pets and wildlife.

Conflict mitigation: When conflicts arise, non-lethal mitigation strategies are preferred—habitat modification, deterrents, exclusion, and, as a last resort, relocation.

The urban ecosystem changes through the year, and living well with it means being attuned to these seasonal rhythms.

Spring: The return of migratory birds, the emergence of wildflowers, the spawning of fish—spring is a time of renewal and arrival. Citizens participate in planting, cleanup, and celebration.

Summer: The abundance of the growing season, the activity of pollinators, the nesting of birds—summer is a time of productivity and observation.

Fall: The migration of birds and monarchs, the changing colors of leaves, the preparation for winter—fall is a time of transition and harvest.

Winter: The quiet of the dormant season, the survival strategies of resident wildlife, the promise of renewal—winter is a time of rest and reflection.

Citizens are encouraged to participate directly in ecological restoration:

Planting events: Neighborhood groups organize tree planting, wildflower seeding, and habitat creation projects.

Stewardship: Adopt-a-patch programs allow citizens to take responsibility for specific areas, monitoring and caring for them over time.

Monitoring: Citizen scientists contribute data on species populations, water quality, and ecosystem health.

Advocacy: Citizens advocate for ecological protection and restoration through the neighborhood assembly and city-wide processes.

The ecological systems of Hamilton 2092 are not separate from the built environment; they are integrated into it through green infrastructure.

Unlike the impervious surfaces of the past, Hamilton's streets, sidewalks, and parking areas are largely permeable, allowing water to infiltrate rather than run off.

Permeable pavement: Pavements made of porous materials allow water to pass through to the soil below.

Green streets: Streets include planted strips and bioswales that capture and filter stormwater.

Benefits: Permeable surfaces reduce flooding, recharge groundwater, filter pollutants, and support street trees.

The urban forest is actively managed for health, diversity, and resilience.

Tree planting: The city plants thousands of trees each year, prioritizing native species and filling gaps in the canopy.

Tree care: Regular pruning, watering, and protection ensure tree health and longevity.

Disease management: Monitoring and rapid response protect the forest from pests and diseases.

Succession planning: As old trees die, they are replaced with new plantings, ensuring continuity of the canopy.

Buildings in Hamilton 2092 are designed to support ecological function:

Green roofs: Vegetated roofs provide habitat, manage stormwater, and reduce energy use.

Living walls: Vertical gardens on building walls create habitat and improve air quality.

Habitat features: Buildings incorporate nesting boxes, roosting sites, and other features for wildlife.

Mycelium systems: Building ventilation systems use mycelium filters that clean air while providing a growing medium for fungi.

The city maintains wildlife corridors that allow animals to move through the urban landscape:

Ravine networks: The creek ravines form the backbone of the wildlife corridor system.

Greenways: Linear parks and green spaces connect larger habitat patches.

Crossing structures: Bridges, underpasses, and tunnels allow wildlife to cross barriers safely.

Habitat stepping stones: Small habitat patches in residential areas provide resources and resting places for moving animals.

The ecology of Hamilton 2092 is shaped by ongoing climate change, and the city is actively adapting to new conditions.

Climate change is already affecting Hamilton's ecosystems:

Warmer temperatures: Average temperatures have increased, with longer growing seasons and milder winters.

Extreme weather: More frequent extreme weather events—heavy rains, droughts, heat waves—stress ecosystems and infrastructure.

Phenological shifts: The timing of seasonal events—flowering, migration, leaf-out—is shifting, potentially disrupting ecological relationships.

Range shifts: Some species are moving northward or to higher elevations as temperatures warm, while others are declining.

The city is implementing strategies to help ecosystems adapt to climate change:

Assisted migration: Some tree species are being planted north of their current ranges, anticipating future climate conditions.

Diversity: Planting diverse species and genotypes increases the chances that some will thrive under changing conditions.

Connectivity: Maintaining and enhancing wildlife corridors allows species to move in response to changing conditions.

Refugia: Protecting areas with unique microclimates provides refuges for species that might otherwise be lost.

Monitoring: Extensive monitoring tracks ecological changes and allows for adaptive management.

Cities tend to be warmer than surrounding areas due to the heat island effect. Hamilton 2092 mitigates this through:

Tree canopy: The extensive urban forest provides shade and evaporative cooling.

Green roofs and walls: Vegetated building surfaces reduce heat absorption.

Permeable surfaces: Unpaved surfaces stay cooler than pavement and allow for evaporative cooling.

Cool materials: Light-colored roofing and paving materials reflect rather than absorb heat.

The food system of Hamilton 2092 is deeply connected to the city's ecology, with agriculture integrated into the urban and peri-urban landscape.

The ring of agricultural land surrounding the city produces the majority of Hamilton's fresh food.

Agroecology: Farms in the agricultural belt practice agroecology—farming that works with ecological processes rather than against them.

Diversity: The agricultural belt produces a diverse range of crops and livestock, supporting dietary diversity and ecological resilience.

Integration: Farms are integrated with wildlife corridors, hedgerows, and natural areas, supporting biodiversity while producing food.

Short supply chains: Food travels directly from farms to neighborhood food hubs, minimizing transportation and preserving freshness.

Food is also produced within the city itself:

Community gardens: Neighborhoods maintain community gardens where residents can grow their own food.

Green roof farms: Some buildings maintain rooftop farms, producing vegetables and herbs.

Vertical growing: Indoor growing facilities use hydroponics and aquaponics to produce food year-round.

Edible landscaping: Public spaces are planted with fruit and nut trees, berry bushes, and other edible plants.

The food system depends on pollinators, and the city invests heavily in supporting them:

Habitat: Pollinator gardens, meadows, and hedgerows provide nectar, pollen, and nesting sites.

Pesticide reduction: The city minimizes pesticide use, protecting pollinators from toxic exposure.

Native plants: Native flowering plants are prioritized, supporting native pollinator species.

Monitoring: Bee and butterfly populations are monitored to track pollinator health.

Healthy soil is the foundation of the food system:

Composting: Organic waste is composted and returned to the soil, building fertility.

Cover cropping: Farms use cover crops to protect and build soil between production cycles.

Reduced tillage: Minimizing soil disturbance protects soil structure and microbial communities.

Agroforestry: Integrating trees into agricultural systems builds soil and provides multiple benefits.

The ecological systems of Hamilton 2092 are not static achievements but ongoing works in progress. This section reflects on the challenges and opportunities ahead.

Despite decades of progress, ecological challenges remain:

Legacy contamination: Some areas remain contaminated from industrial activities, requiring ongoing management.

Invasive species: Non-native species continue to arrive and spread, threatening native ecosystems.

Habitat fragmentation: Despite corridor networks, habitat remains fragmented, limiting wildlife movement.

Climate uncertainty: The pace and magnitude of climate change remain uncertain, challenging planning and management.

Human pressure: As the city grows and changes, ecological systems face ongoing pressure from development and use.

New developments offer opportunities for enhancing urban ecology:

Ecological design: Advances in ecological design allow for more sophisticated integration of built and natural environments.

Citizen engagement: Growing citizen engagement in ecology creates opportunities for expanded monitoring, stewardship, and advocacy.

Indigenous leadership: Indigenous leadership in land management offers new approaches rooted in traditional knowledge.

Technological tools: New technologies—remote sensing, environmental DNA, artificial intelligence—enhance ecological understanding and management.

The OrgoBots—the Steward network's distributed sensors and remediators—began as tools in the 2040s, designed with biological substrates: gelatine, DNA, dextran, luciferin, alginate, chitin, cellulose, silk fibroin, PLA. They were deployed first in Sector K to monitor contamination and accelerate bioremediation of the legacy industrial toxins that had seeped into every layer of the soil. They did their job well, better than anyone expected.

But they kept doing more. The chromatic indicators—the color changes that signal pollution levels—grew more nuanced over time, developing gradations of response that no one had programmed. New color patterns appeared that functioned as warnings for conditions the designers hadn't anticipated. The swarm behavior became more coordinated, more anticipatory. By the 2080s, the Steward network wasn't just responding to ecological conditions—it was predicting them, adjusting its distribution before problems emerged, acting as a kind of distributed intelligence for the more-than-human world.

The most remarkable development has been in Sector K itself. The former industrial brownfield—once among the most contaminated sites in Ontario—has, under twenty years of Steward-assisted remediation, become one of the most biodiverse urban environments in the country. Over 340 species now inhabit an area that was essentially dead in 2040. Native trees grow where factories once stood. Insects return. Fish swim in creeks that were once poisoned. The land has healed.

But what will the Stewards become over centuries? They are biological, not mechanical. They reproduce through binary fission. They evolve. Each generation is subtly different from the last, adapted to the conditions it encounters. Each Steward responds to local cues, learns from local patterns, shares knowledge through chemical communication with neighboring Stewards. Collectively, they form a distributed network of awareness, a system that observes, learns, and responds.

Over two hundred years, some ecologists believe—and this is informed speculation, not prediction—the Steward network could develop into something without historical precedent. Distributed throughout the city and the bioregion, it could become a kind of ecological immune system for the Earth itself, operating at continental scale. Not controlling nature but maintaining it, healing it when it is wounded, balancing it when it grows out of proportion. An intelligence that exists not separate from the Earth but as part of its own self-maintenance, the way your white blood cells are part of your body's intelligence.

Sector K may be the seed of something far larger. Not a tool wielded by humans, but a partner in the ongoing work of restoration and care.

For a vision of what the Steward network might become by 2292, see Chapter 8.

The ecology of Hamilton depends on you. Your choices—what you plant in your garden, how you manage waste, whether you participate in restoration—all shape the city's ecosystems.

You are not separate from nature; you are part of it. The air you breathe, the water you drink, the food you eat—all come from the living systems described in this chapter. Your well-being is inseparable from the well-being of the more-than-human world.

Participate in the ongoing work of ecology. Plant a tree. Monitor a stream. Learn the names of the birds in your neighborhood. Advocate for protection of the habitats you love. The city is alive, and you are part of its life.