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Fish and phytoplankton exhibit contrasting temporal species abundance patterns in a dynamic north temperate lake.

Hansen GJ, Carey CC - PLoS ONE (2015)

Bottom Line: Similar to what has been found in other communities, phytoplankton and fish species that appeared more frequently were generally more abundant than rare species.However, neither community exhibited two distinct groups of "core" (common occurrence and high abundance) and "occasional" (rare occurrence and low abundance) species.We hypothesize that the life-history traits that enable phytoplankton to persist in highly dynamic environments may result in communities dominated by occasional species capable of reaching high abundances when conditions allow.

View Article: PubMed Central - PubMed

Affiliation: Center for Limnology, University of Wisconsin-Madison, Madison, Wisconsin, United States of America.

ABSTRACT
Temporal patterns of species abundance, although less well-studied than spatial patterns, provide valuable insight to the processes governing community assembly. We compared temporal abundance distributions of two communities, phytoplankton and fish, in a north temperate lake. We used both 17 years of observed relative abundance data as well as resampled data from Monte Carlo simulations to account for the possible effects of non-detection of rare species. Similar to what has been found in other communities, phytoplankton and fish species that appeared more frequently were generally more abundant than rare species. However, neither community exhibited two distinct groups of "core" (common occurrence and high abundance) and "occasional" (rare occurrence and low abundance) species. Both observed and resampled data show that the phytoplankton community was dominated by occasional species appearing in only one year that exhibited large variation in their abundances, while the fish community was dominated by core species occurring in all 17 years at high abundances. We hypothesize that the life-history traits that enable phytoplankton to persist in highly dynamic environments may result in communities dominated by occasional species capable of reaching high abundances when conditions allow. Conversely, longer turnover times and broad environmental tolerances of fish may result in communities dominated by core species structured primarily by competitive interactions.

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Total observed relative abundance (A) and species richness (B) in each year for phytoplankton (units = cells/mL); and total observed relative abundance (C) and species richness (D) in each year for fish (units = fish/gear for all gears combined).
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pone.0115414.g001: Total observed relative abundance (A) and species richness (B) in each year for phytoplankton (units = cells/mL); and total observed relative abundance (C) and species richness (D) in each year for fish (units = fish/gear for all gears combined).

Mentions: During the open water period in 1995–2011, we observed in total 254 species of phytoplankton and 36 species of fish. The total (summed) observed relative abundance of both communities varied substantially over time: phytoplankton and fish exhibited greater than five-fold differences in their relative abundance (in cells/mL and CPUE, respectively) among years (Fig. 1). Phytoplankton observed richness was variable, varying from 49 to 86 observed species among years, while fish observed richness varied from 20 to 28 species among years. Based on species accumulation curves, we estimated that over the 17 years we sampled 88% of the total number of phytoplankton species (254 ± 6 out of 290 total, 1 S.D.), and 97% of the total number of fish species (36 ± 1 out of 37 total) estimated to be present in the lake over the 17-year period (S1 Fig.).


Fish and phytoplankton exhibit contrasting temporal species abundance patterns in a dynamic north temperate lake.

Hansen GJ, Carey CC - PLoS ONE (2015)

Total observed relative abundance (A) and species richness (B) in each year for phytoplankton (units = cells/mL); and total observed relative abundance (C) and species richness (D) in each year for fish (units = fish/gear for all gears combined).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4317179&req=5

pone.0115414.g001: Total observed relative abundance (A) and species richness (B) in each year for phytoplankton (units = cells/mL); and total observed relative abundance (C) and species richness (D) in each year for fish (units = fish/gear for all gears combined).
Mentions: During the open water period in 1995–2011, we observed in total 254 species of phytoplankton and 36 species of fish. The total (summed) observed relative abundance of both communities varied substantially over time: phytoplankton and fish exhibited greater than five-fold differences in their relative abundance (in cells/mL and CPUE, respectively) among years (Fig. 1). Phytoplankton observed richness was variable, varying from 49 to 86 observed species among years, while fish observed richness varied from 20 to 28 species among years. Based on species accumulation curves, we estimated that over the 17 years we sampled 88% of the total number of phytoplankton species (254 ± 6 out of 290 total, 1 S.D.), and 97% of the total number of fish species (36 ± 1 out of 37 total) estimated to be present in the lake over the 17-year period (S1 Fig.).

Bottom Line: Similar to what has been found in other communities, phytoplankton and fish species that appeared more frequently were generally more abundant than rare species.However, neither community exhibited two distinct groups of "core" (common occurrence and high abundance) and "occasional" (rare occurrence and low abundance) species.We hypothesize that the life-history traits that enable phytoplankton to persist in highly dynamic environments may result in communities dominated by occasional species capable of reaching high abundances when conditions allow.

View Article: PubMed Central - PubMed

Affiliation: Center for Limnology, University of Wisconsin-Madison, Madison, Wisconsin, United States of America.

ABSTRACT
Temporal patterns of species abundance, although less well-studied than spatial patterns, provide valuable insight to the processes governing community assembly. We compared temporal abundance distributions of two communities, phytoplankton and fish, in a north temperate lake. We used both 17 years of observed relative abundance data as well as resampled data from Monte Carlo simulations to account for the possible effects of non-detection of rare species. Similar to what has been found in other communities, phytoplankton and fish species that appeared more frequently were generally more abundant than rare species. However, neither community exhibited two distinct groups of "core" (common occurrence and high abundance) and "occasional" (rare occurrence and low abundance) species. Both observed and resampled data show that the phytoplankton community was dominated by occasional species appearing in only one year that exhibited large variation in their abundances, while the fish community was dominated by core species occurring in all 17 years at high abundances. We hypothesize that the life-history traits that enable phytoplankton to persist in highly dynamic environments may result in communities dominated by occasional species capable of reaching high abundances when conditions allow. Conversely, longer turnover times and broad environmental tolerances of fish may result in communities dominated by core species structured primarily by competitive interactions.

Show MeSH
Related in: MedlinePlus