Archives for category: Plant Propagation

On May 19 6:30-8PM, our Living Things in an Urban Ecosystem series ended on a high note with Beyond the Honeybee: Exploring Critical Pollinators where we explored the role pollinators play in urban ecosystems and the ways in which individuals and community groups can support their habitats.

Ecologist Howard Ginsberg, Ph.D. from United States Geological Survey first presented a brief survey of native and non-native bee species typically found in NYC.  He found that our city has approximately 50 different species of bumble bees, compared to 100 found in more natural environments which is great news for our urban ecosystem. One fun fact is that bees tend to pollinate on specific seasons because they favor flowers in bloom during that time.  One example is Halictus ligatus, a communal or non-territorial summer bumblebee whose nests are typically found in holes in the ground and their workers are daughters of the queen, unlike honeybees whose workers are typically male.

Summer bee

Halictus ligatus – Summer bee

Our second panelist Tina Harrison, Ph.D. candidate from Rutger’s University Department of Ecology, presented some key ways to support our pollinators here in NYC.

Pesticides used in gardens

Chlorantranilliprole kills less worker bumble bees in a 2013 study

Gardeners and horticulturists should be mindful of the primary chemical used in the pesticide. For example, a study by Larson, Redmond and Potter showed that pesticides containing chlorantraniliprole kills only a small amount of worker bees, especially compared to clothianidin. So be sure to read those labels!

Effects of pesticides on bumble bee populations

Effects of pesticides on bumble bee populations

And finally, biologist Sam Droege, also from USGS, focused his presentation on the challenges of studying bumble bee populations.  He not only highlighted his work on cataloguing bee species (view the beautiful photography here), he spoke on the challenges scientists face when studying bees. One fascinating example was the attempt to study the Bombus bimaculatus, a bee species that, in natural settings, kicks out and takes over nests built by chickadee birds.  After scientists recreated these nests to attract this bee species, they were unable to replicate this occurrence in a controlled setting. Clearly there is more to be studied on attractive bee habitats, which, once successful, would lead to more effective methods of attracting and keeping them within our city.

Megachile-lanata

We then segued into the panel discussion, moderated by landscape architect Hans Hesselein, where we were truly able to unpack the issue of bee colony collapse (which actually does not effect bumblebees), action steps we can take to support their survival, and the potential for future on bee habitats studies .  Listen here for the entire discussion.

We at the Gowanus Canal Conservancy send our heartfelt thanks to our venue sponsor Threes Brewing for generously offering their event space, our panelists, volunteer coordinators and most of all our audience for being part of such a vibrant season.  Stay tuned for the fall schedule!

Join us on our next Clean & Green July 18 11AM-3PM by signing up at volunteer@gowanuscanalconservancy.org where volunteers will participate in the Tree Census and other stewardship activities.

Follow us on Twitter at @GowanusGreen and on Instagram @gowanuscanalconservancy for GCC news, volunteer events and trivia.

Steven Handel, Ph.D. and Director of the Center for Urban Restoration Ecology at Rutgers University gave a dynamic presentation on urban landscape restoration to a packed house at Threes Brewing. Proving case studies of Fresh Kills Park, Jamaica Bay and Brooklyn Bridge Park, Handel highlighted the challenges unique to urban environments such as soil erosion and contamination from pollutants, large amounts of litter, invasive plants that discourage biodiversity and human stressors such as vehicles and nearby commercial businesses.

Jamaica Bay

Jamaica Bay estuary highlighting restoration sites

 

 

 

Brooklyn Bridge Promenade

Promenade at Brooklyn Bridge Park rendering of its restoration that has since been completed

 

 

 

 

 

 

 

 

 

Probing questions were asked by both Handel and the audience such as, would restoring it to its original landscape 100 years ago make sense in today’s climate? What are the key ingredients to a successful restoration? And is there such a thing as over-restoration?  These answers were not simple, given budgetary constraints, environmental stressors and the growing need to address climate change effects.  As shown by Handel’s case studies, partnerships between scientists, city government agencies, landscape designers, environmental nonprofit organizations, and most of all, the local community, can make effective changes for New York City urban spaces and the community members within them.

land stewardship

For more information on restoration ecology, follow Steven Handel on Twitter @snhandel and click the link below to read his article:

Handel – Ecological Restoration Foundations to Designing Habitats in Urban Areas

Click on Eventbrite to come to our next Urban Ecology Lecture on Tuesday, March 24 6:30-8PM where we will explore a hot topic in restoration, Oysters: Limits and Possibilities.  This panel discussion will dive into the role oysters can and do play in marine and coastal shoreline restoration, the challenges and, perhaps most importantly, if they truly live up to their reputation as marine system restorers.

Steven Handel with Gowanus Canal Conservancy staff @ThreesBrewing

Steven Handel with Gowanus Canal Conservancy staff @ThreesBrewing

Follow us on Twitter @GowanusGreen and on Instagram @gowanuscanalconservancy #UELS2015 for more Conservancy news, fun facts, and upcoming events.