Field TalkField Talk http://www.esa.org/fieldtalk audio interviews take you into the field with ecologists Tue, 07 May 2013 01:27:24 +0000 en-US hourly 1 http://wordpress.org/?v=3.5.1 2006-2007 podcast@esa.org (ESA Podcast) podcast@esa.org (ESA Podcast) ESA, Ecology, Environment, Beyond Frontier, Field Talks, The Ecologist Goes to Washington 1440 http://www.esa.org/podcast/images/esa_podcast_small.jpg Field Talk http://www.esa.org/fieldtalk 144 144 ESA Podcast: Field Talks, Beyond the Frontier, The Ecologist Goes to Washington Field Talk audio interviews take you into the field with ecologists. ESA, Podcast, Field, Talks, Ecology, Environment, Frontiers, Environmental, Science, Ecological, Society, of ESA Podcast ESA Podcast podcast@esa.org no no Considering canopy cover in Ecuador http://www.esa.org/fieldtalk/considering-canopy-cover-in-ecuador/ http://www.esa.org/fieldtalk/considering-canopy-cover-in-ecuador/#comments Wed, 30 Jun 2010 17:26:28 +0000 liza http://www.esa.org/fieldtalk/?p=199 … Read more ›]]> Jason Tylianakis

Jason Tylianakis

Loss of canopy cover in rainforests—compared to the other fragmented habitats in Manabi in southwest Ecuador—leads to a region-wide loss of diversity in species interactions, said researchers from the University of Canterbury in New Zealand. As Jason Tilianakis and Etienne Laliberté reported in the June issue of Ecology, the food webs and interactions between parasitoids and their bee and wasp hosts were simplified and homogenized across habitats. As it turns out, land use was not the major contributor to this loss of interaction diversity: The researchers proposed that the lack of canopy cover in the managed and abandoned coffee agroforests and pasture and rice fields allowed for easier access as parasitoids searched for their bee and wasp hosts. In this edition of Field Talk, Jason Tylianakis discusses his findings, the fragmented habitats of Ecuador and the Homogecene era.

]]> http://www.esa.org/fieldtalk/considering-canopy-cover-in-ecuador/feed/ 0 0:10:46 Jason Tylianakis Loss of canopy cover in rainforests—compared to the other fragmented habitats in Manabi in southwest Ecuador—leads to a region-wide loss of diversity in species interactions, said researchers from the University of Canterbury i[...] Jason Tylianakis Loss of canopy cover in rainforests—compared to the other fragmented habitats in Manabi in southwest Ecuador—leads to a region-wide loss of diversity in species interactions, said researchers from the University of Canterbury in New Zealand. As Jason Tilianakis and Etienne Laliberté reported in the June issue of Ecology, the food webs and interactions between parasitoids and their bee and wasp hosts were simplified and homogenized across habitats. As it turns out, land use was not the major contributor to this loss of interaction diversity: The researchers proposed that the lack of canopy cover in the managed and abandoned coffee agroforests and pasture and rice fields allowed for easier access as parasitoids searched for their bee and wasp hosts. In this edition of Field Talk, Jason Tylianakis discusses his findings, the fragmented habitats of Ecuador and the Homogecene era. ESA Podcast no no Stepping stones of diversity: the Santa Barbara landscape and giant kelp genetics http://www.esa.org/fieldtalk/stepping-stones-of-diversity-the-santa-barbara-landscape-and-giant-kelp-genetics/ http://www.esa.org/fieldtalk/stepping-stones-of-diversity-the-santa-barbara-landscape-and-giant-kelp-genetics/#comments Mon, 01 Mar 2010 22:06:00 +0000 liza http://www.esa.org/fieldtalk/?p=184 … Read more ›]]> Filipe Alberto, a marine population geneticist at the Centre for Marine Sciences in PortugalWhat is it about the rocky habitat in California that makes giant kelp so prevalent? And how do they spread from one section of the Santa Barbara Channel to another? According to Filipe Alberto, a marine population geneticist at the Centre for Marine Sciences in Portugal, giant kelp spread from one area to another in a stepping stone fashion, changing their genetic make-up as they go along. In his study, published in the January issue of Ecology, Filipe and colleagues analyzed the effects of isolation on genetic diversity between kelp forests. Diving with researchers from the University of California, Santa Barbara, Filipe collected all the samples he needed to study their genetic diversity—and he did it in just two weeks at the coastal Long Term Ecological Research (LTER) site in Conception, California. The samples, which were then shipped back to Portugal, showed that habitat continuity plays an important role in genetic connectivity.

]]> http://www.esa.org/fieldtalk/stepping-stones-of-diversity-the-santa-barbara-landscape-and-giant-kelp-genetics/feed/ 0 0:10:34 What is it about the rocky habitat in California that makes giant kelp so prevalent? And how do they spread from one section of the Santa Barbara Channel to another? According to Filipe Alberto, a marine population geneticist at the Centre for Marin[...] What is it about the rocky habitat in California that makes giant kelp so prevalent? And how do they spread from one section of the Santa Barbara Channel to another? According to Filipe Alberto, a marine population geneticist at the Centre for Marine Sciences in Portugal, giant kelp spread from one area to another in a stepping stone fashion, changing their genetic make-up as they go along. In his study, published in the January issue of Ecology, Filipe and colleagues analyzed the effects of isolation on genetic diversity between kelp forests. Diving with researchers from the University of California, Santa Barbara, Filipe collected all the samples he needed to study their genetic diversity—and he did it in just two weeks at the coastal Long Term Ecological Research (LTER) site in Conception, California. The samples, which were then shipped back to Portugal, showed that habitat continuity plays an important role in genetic connectivity. ESA Podcast no no Arctic shrubs looming large: Climate change and tundra productivity http://www.esa.org/fieldtalk/arctic-shrubs-looming-large-climate-change-and-tundra-productivity/ http://www.esa.org/fieldtalk/arctic-shrubs-looming-large-climate-change-and-tundra-productivity/#comments Fri, 09 Oct 2009 19:37:38 +0000 liza http://www.esa.org/fieldtalk/?p=176 … Read more ›]]> James Hudson_sAll around the world, the subtle—and not-so-subtle—impacts of climate change are becoming apparent.  In the Arctic, where temperatures are warming at about twice the rate of lower latitudes, researchers are discovering marked changes in the landscape. In this month’s Field Talk, we take a trip to the High Arctic with James Hudson, whose paper in the October issue of Ecology looks at a tundra community on Canada’s Ellesmere Island. Hudson and his colleagues found that changes in temperature and seasonality are causing the normally low-lying shrubs in this area to grow to nearly twice their usual weight. Given the importance of the Arctic to global nutrient cycling, these types of studies can provide a road map to identifying areas of likely change.

]]> http://www.esa.org/fieldtalk/arctic-shrubs-looming-large-climate-change-and-tundra-productivity/feed/ 0 0:13:46 All around the world, the subtle—and not-so-subtle—impacts of climate change are becoming apparent.  In the Arctic, where temperatures are warming at about twice the rate of lower latitudes, researchers are discovering marked changes in the[...] All around the world, the subtle—and not-so-subtle—impacts of climate change are becoming apparent.  In the Arctic, where temperatures are warming at about twice the rate of lower latitudes, researchers are discovering marked changes in the landscape. In this month’s Field Talk, we take a trip to the High Arctic with James Hudson, whose paper in the October issue of Ecology looks at a tundra community on Canada’s Ellesmere Island. Hudson and his colleagues found that changes in temperature and seasonality are causing the normally low-lying shrubs in this area to grow to nearly twice their usual weight. Given the importance of the Arctic to global nutrient cycling, these types of studies can provide a road map to identifying areas of likely change. ESA Podcast no no