The effect of increased habitat complexity and density-dependent non-consumptive interference on pest suppression by winter-active spiders

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F17%3A43912065" target="_blank" >RIV/62156489:43410/17:43912065 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/17:00094341

Výsledek na webu

<a href="https://doi.org/10.1016/j.agee.2017.03.025" target="_blank" >https://doi.org/10.1016/j.agee.2017.03.025</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.agee.2017.03.025" target="_blank" >10.1016/j.agee.2017.03.025</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The effect of increased habitat complexity and density-dependent non-consumptive interference on pest suppression by winter-active spiders

Popis výsledku v původním jazyce

Artificially increased habitat complexity can improve the biocontrol service provided by generalist predators as it can reduce intraguild predation (IGP). However, several counteracting mechanisms can buffer the effect of reduced IGP. Here, we investigated whether the cardboard bands installed in pear trees in early winter improve the suppression of the serious pest pear psylla (Cacopsylla pyri) by winter-active spiders (Anyphaena accentuata and Philodromus spp.). We also investigated in laboratory experiments whether the increased abundances of some predators (Philodromus sp.) would result in negative or positive predator-predator interactions and whether the type and/or intensity of interaction is temperature dependent. On average, pear trees with cardboard bands hosted less psylla than control trees. This pattern can be attributed to predation by winter-active spiders, as 45% of individuals were psylla positive using molecular gut-content analysis. However, 58% of Anyphaena spiders were also Philodromus positive. The suppression efficiency for psylla increased asymptotically with the increasing density of winter-active spiders. In the laboratory, the per capita capture rate of philodromids decreased with the density of conspecifics, which translated in an asymptotic increase in predation pressure on the pear psylla. Non-consumptive intra-trophic-level interference was more intense at 12 oC than at 7 oC. The results show that artificially increasing habitat complexity by installing corrugated cardboard bands around the trunks and branches of pear trees increased predation pressure on the pear psylla as it most likely reduced IGP among winter-active spiders. The installation of corrugated cardboard bands around trees could represent an environmentally-friendly management practice in fruit orchards that improves the biocontrol service provided by generalist predators.

Název v anglickém jazyce

The effect of increased habitat complexity and density-dependent non-consumptive interference on pest suppression by winter-active spiders

Popis výsledku anglicky

Artificially increased habitat complexity can improve the biocontrol service provided by generalist predators as it can reduce intraguild predation (IGP). However, several counteracting mechanisms can buffer the effect of reduced IGP. Here, we investigated whether the cardboard bands installed in pear trees in early winter improve the suppression of the serious pest pear psylla (Cacopsylla pyri) by winter-active spiders (Anyphaena accentuata and Philodromus spp.). We also investigated in laboratory experiments whether the increased abundances of some predators (Philodromus sp.) would result in negative or positive predator-predator interactions and whether the type and/or intensity of interaction is temperature dependent. On average, pear trees with cardboard bands hosted less psylla than control trees. This pattern can be attributed to predation by winter-active spiders, as 45% of individuals were psylla positive using molecular gut-content analysis. However, 58% of Anyphaena spiders were also Philodromus positive. The suppression efficiency for psylla increased asymptotically with the increasing density of winter-active spiders. In the laboratory, the per capita capture rate of philodromids decreased with the density of conspecifics, which translated in an asymptotic increase in predation pressure on the pear psylla. Non-consumptive intra-trophic-level interference was more intense at 12 oC than at 7 oC. The results show that artificially increasing habitat complexity by installing corrugated cardboard bands around the trunks and branches of pear trees increased predation pressure on the pear psylla as it most likely reduced IGP among winter-active spiders. The installation of corrugated cardboard bands around trees could represent an environmentally-friendly management practice in fruit orchards that improves the biocontrol service provided by generalist predators.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10616 - Entomology

Projekt

<a href="/cs/project/QJ1210209" target="_blank" >QJ1210209: Inovace pěstitelských systémů jádrovin se zaměřením na organickou produkci tržní kvality.</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Agriculture, Ecosystems and Environment

ISSN

0167-8809

e-ISSN

—

Svazek periodika

242

Číslo periodika v rámci svazku

1 May

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

26-33

Kód UT WoS článku

000403033400004

EID výsledku v databázi Scopus

2-s2.0-85016420559