Community structure and collapses in multichannel food webs: Role of consumer body sizes and mesohabitat productivities

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F21%3A43903015" target="_blank" >RIV/60076658:12310/21:43903015 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60077344:_____/21:00542923

Výsledek na webu

<a href="https://onlinelibrary.wiley.com/doi/epdf/10.1111/ele.13772" target="_blank" >https://onlinelibrary.wiley.com/doi/epdf/10.1111/ele.13772</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/ele.13772" target="_blank" >10.1111/ele.13772</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Community structure and collapses in multichannel food webs: Role of consumer body sizes and mesohabitat productivities

Popis výsledku v původním jazyce

Multichannel food webs are shaped by the ability of apex predators to link asymmetric energy flows in mesohabitats differing in productivity and community traits. While body size is a fundamental trait underlying life histories and demography, its implications for structuring multichannel food webs are unexplored. To fill this gap, we develop a model that links population responses to predation, and resource availability to community-level patterns, using a tri-trophic food web model with two populations of intermediate consumers and a size-selective top predator. We show that asymmetries in mesohabitat productivities and consumer body sizes drive food web structure, merging previously separate theory on apparent competition and emergent Allee effects (i.e. abrupt population collapses) of top predators. Our results yield theoretical support for empirically observed stability of asymmetric multichannel food webs and discover three novel types of emergent Allee effects involving intermediate consumers, multiple populations or multiple alternative stable states.

Název v anglickém jazyce

Community structure and collapses in multichannel food webs: Role of consumer body sizes and mesohabitat productivities

Popis výsledku anglicky

Multichannel food webs are shaped by the ability of apex predators to link asymmetric energy flows in mesohabitats differing in productivity and community traits. While body size is a fundamental trait underlying life histories and demography, its implications for structuring multichannel food webs are unexplored. To fill this gap, we develop a model that links population responses to predation, and resource availability to community-level patterns, using a tri-trophic food web model with two populations of intermediate consumers and a size-selective top predator. We show that asymmetries in mesohabitat productivities and consumer body sizes drive food web structure, merging previously separate theory on apparent competition and emergent Allee effects (i.e. abrupt population collapses) of top predators. Our results yield theoretical support for empirically observed stability of asymmetric multichannel food webs and discover three novel types of emergent Allee effects involving intermediate consumers, multiple populations or multiple alternative stable states.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10618 - Ecology

Projekt

<a href="/cs/project/GA14-29857S" target="_blank" >GA14-29857S: Vliv rizika predace a komplexity prostředí na dynamiku vytváření společenstev vodních bezobratlých</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Ecology Letters

ISSN

1461-023X

e-ISSN

—

Svazek periodika

24

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

1607-1618

Kód UT WoS článku

000654040200001

EID výsledku v databázi Scopus

2-s2.0-85106413416