نتایج جستجو برای: trophic transfer

تعداد نتایج: 304989  

2014
Yoshito Chikaraishi Shawn A Steffan Nanako O Ogawa Naoto F Ishikawa Yoko Sasaki Masashi Tsuchiya Naohiko Ohkouchi

Food webs are known to have myriad trophic links between resource and consumer species. While herbivores have well-understood trophic tendencies, the difficulties associated with characterizing the trophic positions of higher-order consumers have remained a major problem in food web ecology. To better understand trophic linkages in food webs, analysis of the stable nitrogen isotopic composition...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2016
Jens-Christian Svenning Pil B M Pedersen C Josh Donlan Rasmus Ejrnæs Søren Faurby Mauro Galetti Dennis M Hansen Brody Sandel Christopher J Sandom John W Terborgh Frans W M Vera

Trophic rewilding is an ecological restoration strategy that uses species introductions to restore top-down trophic interactions and associated trophic cascades to promote self-regulating biodiverse ecosystems. Given the importance of large animals in trophic cascades and their widespread losses and resulting trophic downgrading, it often focuses on restoring functional megafaunas. Trophic rewi...

Background and Objectives: Rare earth elements (REEs) are examples of emerging contaminants that have recently been increasingly spread to the environment through the extensive use in modern commodities, medical facilities, petroleum refining, mining, chemical fertilizers, electronic wastes and recycling plants. However, these elements are considered due to their potential human and ecological ...

2002
Rainer Froese Stefan Garthe Uwe Piatkowski Daniel Pauly

We compared several large marine ecosystems in terms of species numbers of fishes, sea birds, marine mammals, and cephalopods. We examined how these numbers were distributed by trophic level, from herbivores to top predators. We created group-specific trophic signatures as plots of number of species by trophic level, and used these to identify similarities and discrepancies between taxonomic gr...

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