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Benthification, biotic homogenization behind the trophic downgrading in altered ecosystems

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F19%3A00509650" target="_blank" >RIV/60077344:_____/19:00509650 - isvavai.cz</a>

  • Result on the web

    <a href="https://esajournals.onlinelibrary.wiley.com/doi/pdfdirect/10.1002/ecs2.2757" target="_blank" >https://esajournals.onlinelibrary.wiley.com/doi/pdfdirect/10.1002/ecs2.2757</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1002/ecs2.2757" target="_blank" >10.1002/ecs2.2757</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Benthification, biotic homogenization behind the trophic downgrading in altered ecosystems

  • Original language description

    Several dozen fish species have been introduced into Neotropical waters, causing significant biotic changes that include deterministic predation interactions with ecosystem effects. In general, reservoirs are preferred over lakes as places for stocking policies, due to their artificial aspect, consequently promoting fish introductions. In a meta-analytic approach, we compared the biomass of plankton-feeding (and top predators) with bottom-feeding fish species between reservoirs and lakes, considering the influence of invaders and trophic levels. Among the 26 ecosystems (12 reservoirs and 14 lakes), there is a dominance of non-native bottom-feeding species in artificial environments. We revealed a mechanism behind this dominance in a study case, a tendency for trophic downgrading and biotic homogenization based on interactions between an expatriate invasive centrarchid (sunfish family) predator from North America (the largemouth bass Micropterus salmoides) and two omnivorous cichlids from Africa in novel environmental contexts in Brazil (the benthification process). Both juvenile and adult largemouth bass are keystone predators in aquatic food webs in both their native and introduced ranges. The omnivore-detritivore tilapiines Oreochromis spp. and the phytophagous-omnivorous Coptodon spp. are species that exhibits strong generalist tendencies. Such species feed on the omnivore and detritivore compartments, enhancing detritus cycling among a large variety of delta C-13 sources. Since their consumption is disproportionate, facilitation of other species occurs with multiplicative effects in the environment. Interactions between invasive species, that is, when an invasive predator (bird, fish, or invertebrate) eats an invasive prey (mainly fish and invertebrates), can serve to highlight biotic homogenization on fresh waters.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10618 - Ecology

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2019

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Ecosphere

  • ISSN

    2150-8925

  • e-ISSN

  • Volume of the periodical

    10

  • Issue of the periodical within the volume

    6

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    20

  • Pages from-to

    e02757

  • UT code for WoS article

    000483221900011

  • EID of the result in the Scopus database

    2-s2.0-85066977301