Resisting annihilation: relationships between functional trait dissimilarity, assemblage competitive power and allelopathy.

Muhl, Rika M. W., Roelke, Daniel L., Zohary, Tamar, Moustaka-Gouni, Maria, Sommer, Ulrich, Borics, Gabor, Gaedke, Ursula, Withrow, Frances G., Bhattacharyya, Joydeb and Jeyasingh, Punidan (2018) Resisting annihilation: relationships between functional trait dissimilarity, assemblage competitive power and allelopathy. Ecology Letters, 21 (9). pp. 1390-1400. DOI 10.1111/ele.13109.

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Supplementary data:

Abstract

Allelopathic species can alter biodiversity. Using simulated assemblages that are characterised by neutrality, lumpy coexistence and intransitivity, we explore relationships between within-assemblage competitive dissimilarities and resistance to allelopathic species. An emergent behaviour from our models is that assemblages are more resistant to allelopathy when members strongly compete exploitatively (high competitive power). We found that neutral assemblages were the most vulnerable to allelopathic species, followed by lumpy and then by intransitive assemblages. We find support for our modeling in real-world time-series data from eight lakes of varied morphometry and trophic state. Our analysis of this data shows that a lake’s history of allelopathic phytoplankton species biovolume density and dominance is related to the number of species clusters occurring in the plankton assemblages of those lakes, an emergent trend similar to that of our modeling. We suggest that an assemblage’s competitive power determines its allelopathy resistance.

Document Type: Article
Keywords: Allelopathy, exploitative competition, interference competition, intransitivity, lumpy coexistence, neutrality, species supersaturated assemblages
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-N Experimental Ecology - Food Webs
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1111/ele.13109
ISSN: 1461-023X
Related URLs:
Date Deposited: 17 Jul 2018 08:26
Last Modified: 01 Feb 2019 15:03
URI: http://oceanrep.geomar.de/id/eprint/43675

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