Water column processes differentially influence richness and diversity of neutral, lumpy and intransitive phytoplankton assemblages

Withrow, Frances G.; Roelke, Daniel L.; Muhl, Rika M.W.; Bhattacharyya, Joydeb

doi:10.1016/j.ecolmodel.2018.01.002

Cited by 4 publications

(2 citation statements)

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“…An explanation for this may be that an allelopathic species can be expected to affect the population dynamics of assemblage members differentially when they are competitively dissimilar. Interestingly, other modeling studies comparing the resistance and resilience of neutral, lumpy and intransitive assemblages to various other processes common in aquatic environments showed that intransitive assemblages were generally much more vulnerable to biodiversity collapses than neutral and lumpy assemblages, suggesting incidence of intransitivity in plankton systems might be rare (Roelke & Eldridge 2008;Bhattacharyya et al 2018;Withrow et al 2018). Here, we show that when allelopathic interactions are considered, intransitive assemblages are more resistant, which suggests intransitivity in plankton systems might not be as rare as previously suggested.…”

Section: Discussionsupporting

confidence: 53%

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

et al. 2018

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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.

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Section: Discussionsupporting

confidence: 53%

“…; Withrow et al . ). Here, we show that when allelopathic interactions are considered, intransitive assemblages are more resistant, which suggests intransitivity in plankton systems might not be as rare as previously suggested.…”

Section: Discussionmentioning

confidence: 97%