A stressor-independent test for biodiversity – ecosystem function relationships during a 23-year whole-lake experiment. Vinebrooke, R., D., Turner, M., A., Findlay, D., L., & Paterson, M., J. Canadian Journal of Fisheries and Aquatic Sciences, 66(11):1903-1909, 2009. ![A stressor-independent test for biodiversity – ecosystem function relationships during a 23-year whole-lake experiment [pdf]](https://bibbase.org/img/filetypes/pdf.svg "pdf")
Paper abstract bibtex Abstract: Anthropogenic stressors are the current drivers of loss of global biodiversity and deterioration of ecosystem function (e.g., primary production). However, it is debatable whether human stressors or associated changes in biodiversity better predict the impairment of ecosystem function. Variation in plankton communities during a whole-lake experiment (Lake 302S, Experimental Lakes Area, Canada) was examined to test whether the stressor treatment effect or subsequent stressor-independent variation in species richness best explained interannual variation in aggregate functional properties, such as productivity or net total biomass. Although significant ‘‘biodiversity – ecosystem function’’ relationships were de- tected, these correlations were confounded by the negative effect of experimental acidification on species richness. The stressor effect was removed by plotting functional properties against the residuals from the species richness – pH regres- sions, which generated either negative or nonsignificant relationships. The lack of significant stressor-independent positive relationships between functional properties and species richness highlights the potential greater importance of other media- ting factors, such as interactions among multiple stressors, species identity, and altered trophic interactions, at the whole- ecosystem scale. Re ´sume ´ : Les stress anthropiques sont les causes courantes de la perte de la biodiversite ´ globale et de la de ´rioration du ´te fonctionnement des e ´cosyste `mes (par ex., de la production primaire). Il n’est pas clair, cependant, si ce sont les facteurs anthropiques de stress ou les changements de biodiversite ´ qui leur sont associe ´s qui pre ´disent le mieux la de ´rioration du ´te fonctionnement des e ´cosyste `mes. Nous avons examine ´ la variation des communaute ´s de plancton dans une expe ´rience a ` l’e ´chelle d’un lac entier (lac 302S, Re ´gion des lacs expe ´rimentaux, Canada) afin de ve ´rifier si la variation interannuelle des proprie ´s fonctionnelles globales, telles que la productivite ´te ´ ou la biomasse totale nette, s’expliquent mieux par les ef- fets du traitement de stress ou par la variation subse ´quente de la richesse spe ´cifique qui est inde ´pendante du facteur de stress. Bien que des relations significatives « biodiversite ´ – fonction e ´cosyste ´mique » puissent e ˆtre de ´cele ´es, ces corre ´lations sont obscurcies par l’effet ne ´gatif de l’acidification expe ´rimentale sur la richesse spe ´cifique. L’effet du facteur de stress est retire ´ en repre ´sentant sur un graphique les proprie ´s fonctionnelles en fonction des re ´te ´sidus des re ´gressions de la ri- chesse spe ´cifique sur le pH, ce qui ge `re des relations ne ´ne ´gatives ou alors non significatives. L’absence de relations posi- tives significatives inde ´pendantes du facteur de stress entre les proprie ´s fonctionnelles et la richesse spe ´te ´cifique souligne l’importance potentiellement supe ´rieure d’autres facteurs explicatifs, tels que les interactions entre les multiples facteurs de stress, l’identite ´ des espe `ces et l’alte ´ration des relations trophiques a ` l’e ´chelle de l’e ´cosyste `me entier. [Traduit par la Re ´daction] Introduction
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abstract = {Abstract: Anthropogenic stressors are the current drivers of loss of global biodiversity and deterioration of ecosystem function (e.g., primary production). However, it is debatable whether human stressors or associated changes in biodiversity better predict the impairment of ecosystem function. Variation in plankton communities during a whole-lake experiment (Lake 302S, Experimental Lakes Area, Canada) was examined to test whether the stressor treatment effect or subsequent stressor-independent variation in species richness best explained interannual variation in aggregate functional properties, such as productivity or net total biomass. Although significant ‘‘biodiversity – ecosystem function’’ relationships were de- tected, these correlations were confounded by the negative effect of experimental acidification on species richness. The stressor effect was removed by plotting functional properties against the residuals from the species richness – pH regres- sions, which generated either negative or nonsignificant relationships. The lack of significant stressor-independent positive relationships between functional properties and species richness highlights the potential greater importance of other media- ting factors, such as interactions among multiple stressors, species identity, and altered trophic interactions, at the whole- ecosystem scale. Re ´sume ´ : Les stress anthropiques sont les causes courantes de la perte de la biodiversite ´ globale et de la de ´rioration du ´te fonctionnement des e ´cosyste `mes (par ex., de la production primaire). Il n’est pas clair, cependant, si ce sont les facteurs anthropiques de stress ou les changements de biodiversite ´ qui leur sont associe ´s qui pre ´disent le mieux la de ´rioration du ´te fonctionnement des e ´cosyste `mes. Nous avons examine ´ la variation des communaute ´s de plancton dans une expe ´rience a ` l’e ´chelle d’un lac entier (lac 302S, Re ´gion des lacs expe ´rimentaux, Canada) afin de ve ´rifier si la variation interannuelle des proprie ´s fonctionnelles globales, telles que la productivite ´te ´ ou la biomasse totale nette, s’expliquent mieux par les ef- fets du traitement de stress ou par la variation subse ´quente de la richesse spe ´cifique qui est inde ´pendante du facteur de stress. Bien que des relations significatives « biodiversite ´ – fonction e ´cosyste ´mique » puissent e ˆtre de ´cele ´es, ces corre ´lations sont obscurcies par l’effet ne ´gatif de l’acidification expe ´rimentale sur la richesse spe ´cifique. L’effet du facteur de stress est retire ´ en repre ´sentant sur un graphique les proprie ´s fonctionnelles en fonction des re ´te ´sidus des re ´gressions de la ri- chesse spe ´cifique sur le pH, ce qui ge `re des relations ne ´ne ´gatives ou alors non significatives. L’absence de relations posi- tives significatives inde ´pendantes du facteur de stress entre les proprie ´s fonctionnelles et la richesse spe ´te ´cifique souligne l’importance potentiellement supe ´rieure d’autres facteurs explicatifs, tels que les interactions entre les multiples facteurs de stress, l’identite ´ des espe `ces et l’alte ´ration des relations trophiques a ` l’e ´chelle de l’e ´cosyste `me entier. [Traduit par la Re ´daction] Introduction},
bibtype = {article},
author = {Vinebrooke, R. D. and Turner, M. A. and Findlay, D. L. and Paterson, M. J.},
journal = {Canadian Journal of Fisheries and Aquatic Sciences},
number = {11},
keywords = {ACIDIFICATION,BIODIVERSITY,ELA,HUMAN,L302S,Multiple stressors,PH,PHYTOPLANKTON,PRIMARY PRODUCTION,SCALE,SPECIES DIVERSITY,Whole-lake manipulation,ZOOPLANKTON}
}
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