@article{PAR00003107,
  title = {{C}ontrolling for natural variability in assessing the response of fish metrics to human pressures for lakes in north-east {USA}},
  author = {{I}rz, {P}. and {D}e {B}ortoli, {J}. and {M}ichonneau, {F}. and {W}hittier, {T}. {R}. and {O}berdorff, {T}hierry and {A}rgillier, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {1. {W}hile fish-based {I}ndices of {B}iotic {I}ntegrity ({IBI}s) have been developed for a wide array of lotic systems, equivalent tools have seldom been adapted to the monitoring and assessment of lakes. {M}ajor difficulties arise in such work: (i) collecting data that allow statistically robust analyses, (ii) choosing the relevant variables to describe the biotic, environmental and anthropogenic data sets and (iii) assessing the relative importance of the latter two in explaining the former. {T}he aim of the present paper is to produce {S}uch an assessment for the fish communities of the lakes of north-east {USA}. 2. {F}ish surveys, environmental features and catchment-scale descriptors of human stresses (agricultural and urban land-uses) were collected for 112 natural lakes. 3. {F}ish metrics, i.e. species richness and percentages of species belonging to reproductive, trophic, and tolerance guilds, were regressed against anthropogenic variables, then against anthropogenic variables and the natural environmental conditions. 4. {I}t was shown that failing to control for the natural environmental conditions in the {IBI} construction led to selecting metrics (percentage of intolerant species and percentage of omnivorous species) that did not display response to stresses when the environment was controlled for. {M}oreover, controlling for natural variability of the metrics allowed identifying the impact of agricultural land-use on the percentage of diadromous species. 5. {F}ish communities appear valuable for the bioassessment of lakes. {A}ppropriate statistical methods have proved that the natural variability in the bioassessment tools could be accounted for, thereby allowing assessments at the scale of multiple basins and ecoregions. {T}his opens new perspectives for the development of {IBI}s for lentic systems in lake-poor regions, such as {S}outhern {E}urope, and therefore represents a significant contribution to the implementation of the {E}uropean {W}ater {F}ramework {D}irective.},
  keywords = {{B}iological monitoring ; {L}entic systems ; {I}mpact ; {V}ariance partitioning ; {F}unctional guilds ; {I}ndex of biotic integrity ; {L}and use ; {U}rbanization},
  booktitle = {},
  journal = {{A}quatic {C}onservation : {M}arine and {F}reshwater {E}cosystems},
  volume = {18},
  numero = {5},
  pages = {633--646},
  ISSN = {1052-7613},
  year = {2008},
  DOI = {10.1002/aqc.859},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00003107},
}