Top down control food web
WebSimplification to main energy channels linking primary producers to top consumers has been recently advocated. Following this approach, we propose a general framework for the analysis of bottom-up and top-down forcing of ecosystems by reducing food webs to two energy pathways originating from a limiting resource shared by competing guilds of ...
Top down control food web
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Web6. aug 2024 · We assembled replicate plant-aphid-parasitoid communities (see food web in Figure 1F) in 48 mesocosms in the field and exposed them to different intensities of artificial light, ranging from 0.1 to 100 lux, at night for 10 aphid generations. To understand the mechanisms behind the impacts of artificial light, we complemented the field experiment … Web1. jún 1992 · This work proposes a general framework for the analysis of bottom-up and top-down forcing of ecosystems by reducing food webs to two energy pathways originating from a limiting resource shared by competing guilds of primary producers. 90 PDF
Web24. jan 2016 · Omnivory in intermediate trophic levels decreases the strength of top-down control. • Connected food webs can have stronger top-down response than linear food chains. Abstract. Top-down control in ecosystems is dependent on food web structure. In this study, we developed 126 models describing different trophic link combinations in … Web5. nov 2012 · Warming shifts top-down and bottom-up control of pond food web structure and function The effects of global and local environmental changes are transmitted through networks of interacting organisms to shape the structure of communities and the …
Web1. apr 2024 · Top-down and bottom-up controls regulate the structure and stability of ecosystems, but their relative roles in terrestrial systems have been debated. WebResearch Warming shifts top-down and bottom-up control of pond food web structure and function Jonathan B. Shurin1,*, Jessica L. Clasen1, Hamish S. Greig1,2, Pavel Kratina1,3 …
WebFood web control Bottom-up effects Bottom-up ... Top down control has applications in agriculture and is the principle behind biological control, the idea that plants can benefit from the application of their herbivore’s …
Web26. sep 2006 · Top-down effects imply control through predation, including fishery, while bottom-up effects imply control through food abundance, often thought to be driven by climate or nutrient load. Many marine ecosystems are dominated by a few abundant mid-trophic species, usually pelagic schooling fish, with higher diversity at lower and higher … paramount 1994 moviesWeb19. júl 2005 · Physiological depression of predators because of thermal stress can alter top-down control and lead to changes in community structure. 5. We suggest that thermal … paramount 1997 moviesWeb9. jan 2024 · Top-down control of the food web is the regulation of a population by its predators or consumers. The predators, or top-level consumers, can act as a natural … paramount 1996 moviesWebJSTOR Home paramount 1paramount.comWeb1. jan 2024 · Top-down control of vertical particle flux is often not considered in marine pelagic food webs. Gelatinous zooplankton exhibit top-down control of plankton in the … paramount 1998 vhsWebTop-down control in a detritus-based food web: fish, shredders, and leaf breakdown Received: 15 October 2001 / Accepted: 15 April 2002 / Published online: 29 May 2002 ( … paramount 1997WebIn food webs based on primary production, biomass of organisms within trophic levels can be simultaneously controlled by resources (bottom-up) and consumers (top-down). In … paramount 1999 movies