UDTR — Radar mondial des droits de la Nature

Habitat‐Dependent Effects of Canopy Cover on Insect Predation in a Tropical Dry Forest Landscape

Identification

Clé publique

radar:r-609c89a8e9a33b52fc8e1ad687183356

Auteurs

Camilo Fabián González · Diana Ontaneda‐Jimenez · Nina Farwig · Marina Mazón · Jana E. Schön · Carlos Iván Espinosa · Annemarie Wurz

Année déclarée

2025

Langue déclarée

en

Type source

article

Première détection

2026-11-14T01:59:32.022734+00:00

Dernière observation des métadonnées

2026-11-14T01:59:32.022734+00:00

Dernière vérification HTTP

Non effectuée

Institutions déclarées par la source

Universidad Nacional de Loja · Universidad Técnica Particular de Loja · Philipps University of Marburg · University of Alicante

Pays d’affiliation déclarés

DE · EC · ES

Résumé documentaire — langue originale

ABSTRACT Predator–prey interactions in tropical dry forests remain understudied, despite their central role in the top‐down regulation of insect herbivory, a key process influencing plant fitness, community composition, and nutrient cycling in these threatened ecosystems. This study assessed how predation by invertebrate and vertebrate predators on insect herbivores is affected by habitat type, vegetation structure, elevation, and prey color (white vs. terracotta) in a tropical dry forest. We used plasticine caterpillars to quantify predation rates and to identify predator groups across forest and silvo‐pastoral systems at two elevations. Local vegetation structure was characterized by canopy cover and vegetation density. Chewing arthropods accounted for the majority (81.1%) of predation events. Arthropod attacks were more frequent in forests than in silvo‐pastures, while the opposite was true for birds. Overall, the probability of predation was higher at 600 m a.s.l. compared to 1200 m a.s.l. Notably, canopy cover had contrasting effects depending on habitat type: in forests, predation increased with canopy cover, whereas in silvo‐pastures it decreased. This interaction between canopy cover and habitat type was largely driven by predation exerted by arthropods. Prey color did not affect predation rates. Our results suggest that predator communities respond differently to canopy cover depending on habitat type, likely due to differences in tree species composition and in resource availability for prey or predators. These findings emphasize that top‐down control in a tropical dry forest landscape is shaped by interactions between vegetation structure and habitat type, underscoring the need to consider habitat‐specific mechanisms when predicting ecological processes across heterogeneous environments.

Identifiants

OPENALEX

https://openalex.org/W4417483396

DOI

10.1111/1440-1703.70026

Repères documentaires

Famille documentaire

article

Types déclarés par les sources

article

Éditeurs

Springer Science+Business Media

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Sources

OpenAlex · Document 1

• Document · https://doi.org/10.1111/1440-1703.70026

Statut documentaire

Pertinence à examiner

Bibliothèque

Cette identité n’est pas encore intégrée à la Bibliothèque juridique.