Navigation Links
Aquatic food web tied to land
Date:1/21/2011

Millbrook, NY A distant relative of shrimp, zooplankton are an important food source for fish and other aquatic animals. Long characterized as algae feeders, a new study published this week in the Proceedings of the National Academy of Sciences reports that nearly a third of zooplankton diets are supported by material that originates on land in lake watersheds.

The study brings scientists one step closer to clarifying the role that watershed inputs play in aquatic food webs. While it has been recognized that animals living at the bottom of lakes and streams rely, in part, on inputs from the land, there has been controversy about whether open water animals, such as zooplankton, consume this material.

Lead author and Cary Institute of Ecosystem Studies limnologist Dr. Jonathan J. Cole comments, "Our work changes the paradigm for how we describe the environment that supports fish. Zooplankton are one of the pillars of the aquatic food web. And while they do feed on algae, they also rely on materials derived from maple leaves, pine needles, and whatever else comes in from the surrounding watershed."

Using ambient stable isotopes of carbon, hydrogen, and nitrogen, Cole and colleagues traced the diets of three zooplankton species commonly found in freshwater lakes: Daphnia, Holopedium, and Leptodiaptomus. Animal samples were taken from two Wisconsin lakes with distinct profilesPaul Lake, a small lake with moderate nutrient levels, and Crampton Lake, a larger nutrient-poor lake.

While it has been assumed that the zooplankton feed almost exclusively on algae, biomass analyses revealed a different story. In both lakes, organic matter that originated on land made up approximately a third of zooplankton biomass. When edible algae were scarce, zooplankton derived a higher percentage of their diet from terrestrial material.

Cole notes, "Historically, lake ecosystems have been studied in isolation. Yet we know lakes are connected to their watersheds and organic matter from land enters lakes in the form of run-off or ground water." Adding, "Our study adds to the growing body of evidence that aquatic food webs are subsidized by these inputs."

This is the most recent of several Cary Institute-led studies investigating watershed inputs to aquatic food webs; all of them have resulted in findings that indicate zooplankton feed on land-generated organic matter.


'/>"/>

Contact: Lori M. Quillen
quillenl@caryinstitute.org
845-677-7600 x233
Cary Institute of Ecosystem Studies
Source:Eurekalert  

Related biology news :

1. Commercial aquatic plants offer cost-effective method for treating wastewater
2. Researchers call for nitrogen and phosphorus reductions to combat eutrophication in aquatic systems
3. Study assesses impact of fish stocking on aquatic insects
4. Songs raise awareness about aquatic invasive species
5. Bacteria create aquatic superbugs in waste treatment plants
6. Canadian researchers set to study impact of nanomaterials on aquatic ecosystems
7. Chloride found at levels that can harm aquatic life in urban streams of the Northern US
8. Kent State receives $2.7 million NSF training grant for environmental aquatic resource sensing
9. Aquatic life declines at early stages of urban development
10. New study documents use of hormone progesterone in simple microscopic aquatic animals
11. Healthy watersheds can sustain water supplies, aquatic ecosystems in a changing climate
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Aquatic food web tied to land
(Date:6/14/2017)... IBM ) is introducing several innovative partner startups at ... between startups and global businesses, taking place in ... startups will showcase the solutions they have built with IBM ... France is one of the most ... increase in the number of startups created between 2012 and ...
(Date:4/24/2017)... , April 24, 2017 Janice ... partner with  Identity Strategy Partners, LLP (IdSP) , ... or without President Trump,s March 6, 2017 ... Entry , refugee vetting can be instilled with greater ... (Right now, all refugee applications are suspended by ...
(Date:4/13/2017)... , April 13, 2017 According to a ... Identity Authentication, Identity Analytics, Identity Administration, and Authorization), Service, Authentication Type, Deployment ... the IAM Market is expected to grow from USD 14.30 Billion in ... Rate (CAGR) of 17.3%. ... MarketsandMarkets Logo ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... ... of a complex biological network, a depiction of a system of linkages and ... Dmitry Korkin, PhD, associate professor of computer science at Worcester Polytechnic Institute (WPI) ...
(Date:10/12/2017)... ... October 12, 2017 , ... DuPont Pioneer ... that they have entered into a multiyear collaboration to identify and characterize novel ... additional tools for gene editing across all applications. , Under the terms of ...
(Date:10/12/2017)... ... October 12, 2017 , ... BioMedGPS announces expanded ... of its newest module, US Hemostats & Sealants. , SmartTRAK’s US Market for ... fibrin sealants, synthetic sealants and biologic sealants used in surgical applications. BioMedGPS estimates ...
(Date:10/12/2017)... ... October 12, 2017 , ... ... launched Rosalind™, the first-ever genomics analysis platform specifically designed for life science ... in honor of pioneering researcher Rosalind Franklin, who made a major contribution ...
Breaking Biology Technology: