Elevational contrast in predation and parasitism risk to caterpillars in a tropical rainforest

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F19%3A00510943" target="_blank" >RIV/60077344:_____/19:00510943 - isvavai.cz</a>

Alternative codes found

RIV/60076658:12310/19:43899718

Result on the web

<a href="https://onlinelibrary.wiley.com/doi/full/10.1111/eea.12851" target="_blank" >https://onlinelibrary.wiley.com/doi/full/10.1111/eea.12851</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/eea.12851" target="_blank" >10.1111/eea.12851</a>

Result language

angličtina

Original language name

Elevational contrast in predation and parasitism risk to caterpillars in a tropical rainforest

Original language description

Invertebrate predators and parasitoids are among themost important natural enemies of insect herbivores. Yet, the strength of natural enemy pressure along an altitudinal gradient and interactions between the groups of natural enemies (such as predation on parasitized prey) are not well known. Predation pressure is usually assessed through exposure of artificial prey. However, this method cannot provide information about the attacks of parasitoids, or their eventual interactions with predators. Furthermore, artificial or dead prey might not attract predators because they do not show expected host behavior, and this method mostly cannot distinguish between predation and scavenging. For the first time in a tropical rainforest, we quantified elevational contrast in mortality factors using exposure of live caterpillars. We exposed a total of 800 live caterpillars of Talanga excelsalis moresbyensis Strand (Lepidoptera: Crambidae) on saplings of Ficus copiosa Steud. (Moraceae) at two elevations in primary tropical rain forest in Papua New Guinea (200 and 1 200 m a.s.l.).We exposed the caterpillars in two treatments: exposed to and protected from invertebrate predators and parasitoids. Disappearance of caterpillars was significantly higher in the exposed treatment. Furthermore, caterpillar disappearance was significantly higher in lowlands than in highlands (43 vs. 12%).We consider the vast majority of the disappearance to be due to predation, as migration of the caterpillars from the focal trees was not observed (except one caterpillar). This estimate of invertebrate predation rate corresponds with studies which used artificial caterpillar models. No significant difference in parasitism rate between the two elevations was observed (12 vs. 13%). The combination of the disappearance and parasitism rate patterns means that larval parasitoids face stronger pressure from invertebrate predators through higher predation of their hosts in the lowlands than in the highlands.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10618 - Ecology

Project

<a href="/en/project/GA17-23862S" target="_blank" >GA17-23862S: Trophic interactions as drivers of secondary succession in tropical rainforests: an experimental test in New Guinea</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

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

Name of the periodical

Entomologia Experimentalis et Applicata

ISSN

0013-8703

e-ISSN

—

Volume of the periodical

167

Issue of the periodical within the volume

11

Country of publishing house

US - UNITED STATES

Number of pages

10

Pages from-to

922-931

UT code for WoS article

000496111200001

EID of the result in the Scopus database

2-s2.0-85075000248