Ecology

Charred trees on hillside in Altadena, California after Eaton Fire.

Preserving Altadena’s Trees: A Community Effort to Save a Fire-Damaged Landscape

In the wake of the Eaton Fire, Altadena Green is working to preserve fire-damaged but recoverable trees, advocating for better assessment processes, educating homeowners, and protecting the community’s urban canopy from unnecessary removal.

March 3, 2025 - LAist

Large flock of purple martin birds at dusk flying above a light pole.

Purple Martins Call Nashville Home. Some Wish They Wouldn't

Each year, the city plays host to hundreds of thousands of birds on their way to and from South America.

March 2, 2025 - Maggie Gigandet

Wildfire recovery area with small trees growing in burn areas in Angeles National Forest in California.

Resilient Communities, Healthy Ecosystems: A Balanced Approach to Wildfires

Effective wildfire mitigation in California requires a holistic approach that goes beyond large-scale vegetation removal, emphasizing home hardening, defensible space, strategic planning, and reducing human-caused ignitions.

February 16, 2025 - UCLA Sustainable LA Grand Challenge

Looking up at a grove of mature hemlock trees on a sunny day.

Fighting Forest Pests With AI: A Hemlock Success Story

Fairfax County utilized GeoAI and ArcGIS technology to efficiently map and protect its hemlock trees from the invasive woolly adelgid, ensuring targeted pest management and preservation of its evergreen canopy.

January 21, 2025 - ARCNEWS

Grandfather and young girl sitting on park bench.

Nature and Nurture: Understanding the Diversity of Biophilia

Biophilia, originally thought to be an innate and universal love for nature, is now understood as a temperament trait with significant individual differences influenced by genetics and experience.

January 15, 2025 - Psychology Today

Large trees on either side of wide suburban street.

How AI Is Revolutionizing Urban Forestry and Climate Resilience

Tree-D Fusion, an AI-driven tool developed by MIT and Purdue researchers, generates 3D models of urban trees to help city planners visualize future green spaces, address climate challenges, and enhance urban livability and sustainability.

January 13, 2025 - Wood Central

Large mature oak trees with sun filtering through.

Oak Survival in the Great Lakes: Adapting to a Changing World

Climate change is endangering oaks in the Great Lakes region by increasing their vulnerability to pests, diseases, and extreme weather, threatening their vital ecological role.

January 1, 2025 - Planet Detroit

View of San Francisco Bay on sunny day from residential area of Oakland, California.

Oakland Adopts Urban Forest Plan to Foster Equity and Environmental Justice

The Oakland City Council has adopted its first Urban Forest Plan, a 50-year roadmap focused on equitable tree care, canopy preservation, and environmental justice to benefit underserved communities.

December 23, 2024 - City of Oakland

Close-up of yellow "Warning Biohazard" sign with people in hazmat suits cleaning up in background.

Students Drive Solutions for Environmental Justice Through Video Challenge

The Environmental Justice Video Challenge empowers students and communities to collaboratively address environmental inequities through innovative data-driven strategies, resulting in impactful projects and fostering local leadership.

December 23, 2024 - U.S. Environmental Protection Agency

Woman wearing beanie leaning down over grass covered with fall leaves using tablet to identify plants.

Detecting Invasive Species Early Through Citizen Science

Community science platforms like eBird and iNaturalist enhance early detection of invasive species, complementing professional surveillance and highlighting the need for stronger collaboration between the public and official authorities.

December 22, 2024 - Relational Thinking

Aerial view of Snohomish River and I-5 bridge in Everett, Washington.

Snohomish River Gains Legal Rights

A new law in one Washington town enshrines the river’s legal right to “exist, regenerate, and flourish.”

December 16, 2024 - Inside Climate News

City park with paved walkway, green trees, and people sitting on lawn.

Global Report Shows Urban Forests Failing to Meet Vital Standards

The study reveals significant gaps in urban forestry, emphasizing the urgent need for reforms, innovative planting solutions, and expanded tree canopy to combat climate change and improve urban health.

December 9, 2024 - The Conversation

Hawk perched on tree in city park.

Explore Urban Biodiversity: Join the 2025 City Nature Challenge

The City Nature Challenge invites people worldwide to document urban biodiversity by photographing and sharing wild plants and animals through the iNaturalist app, helping scientists track and understand real-time changes in ecosystems.

November 24, 2024 - Natural History Museum of Los Angeles County

Two-way green painted bike lane in city.

Book Review: Combining Sustainability and Smart Growth

A review of The Sustainable Urban Design Handbook, by architects Nico Larco and Kaarin Knudson.

October 22, 2024 - Michael Lewyn

Aerial view of the Danube River in Belgrade, Serbia.

Report: European Rivers Are in Trouble

Some of the continent’s most important rivers are suffering from overuse and pollution.

October 21, 2024 - Politico

Flock of white snow geese flying and resting in water in Sacramento River delta at sunset.

California Secures $360 Million in Federal Funding for Parks, Habitat Restoration, and Clean Transportation

This funding will drive transformative projects across the state, improving access to green spaces, protecting natural ecosystems, and advancing sustainable transportation initiatives.

October 7, 2024 - Office of Governor Gavin Newsom

Set of black headphones attached to small tray of wheatgrass sitting on table against blue background.

Using Sound to Revive Ecosystems and Enhance Biodiversity

This innovative approach leverages the power of sound to stimulate beneficial soil microbes, offering a novel and eco-friendly tool for ecosystem restoration and biodiversity enhancement.

October 6, 2024 - The Conversation

View of calm Maumee River with fall foliage on other side at sunset.

Great Lakes Water Quality Project Seeks to Restore Coastal Vegetation

A plan to restore perennial plants to agricultural land could help reduce runoff and improve water quality across the Great Lakes region.

October 2, 2024 - Midland Daily News

Blue heron stands on rock in Los Angeles River with green reeds in background.

Annual LA River CleanUp Invites Residents to Protect Local Ecosystems

The Friends of the Los Angeles River will host its 34th Annual LA River CleanUp on October 5, inviting residents to help beautify the river, prevent litter from reaching the ocean, and promote equitable access to green spaces.

October 1, 2024 - Long Beach Press Telegram

Woman in forest looking at plants and documenting on tablet.

Discovering LA’s Biodiversity: The 2024 BioBlitz Challenge

The BioBlitz Challenge invites participants to document local wildlife throughout October using the iNaturalist app, contributing to conservation efforts and scientific research on Los Angeles' biodiversity.

September 30, 2024 - Los Angeles Public Library

Urban Design for Planners 1: Software Tools

This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.

Planning for Universal Design

Learn the tools for implementing Universal Design in planning regulations.

Top Books

An annual review of books related to planning.

Top Schools

The definitive ranking of graduate planning programs.

100 Most Influential Urbanists

The who's who of urbanism, according to Planetizen readers.

Urban Planning Creators You Should Know

A short list of voices on social, video, and podcasting platforms.