How do similar community dynamics yield different population dynamics and spatial distributions of species?

Enav Vidan, Elazar Quinn, Anatoly Trostanetsky, Aviv Rapaport, Josef Doron, Avichai Harush, Moshe Kostyukovsky, Daphna Gottlieb

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The distribution of biotic and abiotic factors creates ecological niches. Despite the link between both the biotic and abiotic components of a species niche and its geographic distribution, most approaches to species-distribution modeling correlate the occurrence of a single species with broad-scale environmental variables, but do not include biotic interactions. We studied the relative effects of biotic and abiotic factors on community composition and dynamics in a man-made ecosystem (i.e., a grain-storage system). We studied the population dynamics of 10 insect species at two climatically distinct study sites: a site with a Mediterranean climate and a site with a semi-arid climate. All species were found to aggregate at both sites and similar community dynamics were observed at the two sites. However, there were differences in the relative importance of biotic and abiotic factors in the formation of communities in the two habitats. This difference yielded different population dynamics and spatial distributions. The Mediterranean site was characterized by species niche overlap and communities at that site were less dense. In contrast, in the semi-arid habitat, species tended to have distinct spatial distribution and there was a high level of community density. These results can be viewed as examples of within- and between-patch coexistence. We discuss the possibility that there may be gradual shifts in the relative importance of within- and between-patch coexistence. Small continuous changes, such as global climate change, could induce such shifts, leading to similar temporal and spatial patterns in the current Mediterranean climate.

Original languageEnglish
Article number101621
JournalJournal of Stored Products Research
Volume87
DOIs
StatePublished - 1 May 2020
Externally publishedYes

Keywords

  • Between-patch coexistence
  • Community dynamics
  • Spatial dynamics
  • Stored-product insects
  • Within-patch coexistence

ASJC Scopus subject areas

  • Food Science
  • Agronomy and Crop Science
  • Insect Science
  • Horticulture

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