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Habitat modification alters the structure of tropical host–parasitoid food webs
TLDR
Altered interaction structure represents an insidious and functionally important hidden effect of habitat modification by humans, indicating that perturbation of the structure and function of ecological communities might be overlooked in studies that do not document and quantify species interactions. Expand
Experimental evidence for the effects of dung beetle functional group richness and composition on ecosystem function in a tropical forest.
TLDR
Overall, both dung and seed removal increased with dung beetle functional group richness, however, levels of ecosystem functioning were idiosyncratic depending on the identity of the functional groups present, indicating an important role for functional group composition. Expand
Effects of habitat patch size and isolation on dispersal by Hesperia comma butterflies : implications for metapopulation structure
TLDR
The under-estimation of long-distance migration by negative exponentials, compared with inverse power functions, may explain why theoretical models haveUnder-estimated the number of occupied patches in metapopulations of H. comma following natural colonization. Expand
Pathogens and insect herbivores drive rainforest plant diversity and composition
TLDR
This study shows experimentally that changes in plant diversity and species composition are caused by fungal pathogens and insect herbivores, and provides an overall test of the Janzen–Connell hypothesis. Expand
The global distribution of diet breadth in insect herbivores
TLDR
A global dataset is used to investigate host range for over 7,500 insect herbivore species covering a wide taxonomic breadth and interacting with more than 2,000 species of plants in 165 families to ask whether relatively specialized and generalized herbivores represent a dichotomy rather than a continuum from few to many host families and species attacked and whether diet breadth changes with increasing plant species richness toward the tropics. Expand
Guild-specific patterns of species richness and host specialization in plant-herbivore food webs from a tropical forest.
TLDR
A complex, species-rich plant-herbivore food web for lowland rain forest in Papua New Guinea is described, resolving 6818 feeding links between 224 plant species and 1490 herbivore species drawn from 11 distinct feeding guilds. Expand
Structural dynamics and robustness of food webs.
TLDR
This work identifies a new category of species--overlap species--which promote robustness as shown by comparing simulations incorporating structural dynamics to those with static topologies, and investigates structural dynamics in 12 empirically documented food webs by simulating primary species loss using three realistic removal criteria. Expand
Structure of a diverse tropical forest insect–parasitoid community
TLDR
Both the summary web and the seasonal webs show low levels of compartmentalization, suggesting that the host–parasitoid community is not divided into relatively discrete subwebs with largely independent dynamics, and that species in the same taxonomic order are more likely to interact indirectly. Expand
Plant pathogens drive density-dependent seedling mortality in a tropical tree.
TLDR
It is shown experimentally that pathogens from the Oomycota are associated with intense mortality in seedlings of a neotropical tree, Sebastiana longicuspis, suggesting that short-term observational studies may underestimate the intensity and form of pathogen-induced mortality. Expand
Escape from natural enemies during climate‐driven range expansion: a case study
TLDR
The present study investigated parasitism in the Brown Argus butterfly, Aricia agestis; a species that has expanded northward in Britain during the last 30 years in association with climate warming. Expand
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