@article{fdi:010080601,
  title = {{D}iversity patterns of aquatic macroinvertebrates in a tropical high-{A}ndean catchment},
  author = {{E}spinosa, {R}. and {A}ndino, {P}. and {C}auvy-{F}raunie, {S}. and {D}angles, {O}livier and {J}acobsen, {D}. and {C}respo-{P}erez, {V}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}ntroduction: {G}lacierised catchments are remote and hostile environments, in which streams from different water sources (e.g., glacier melt, rain/snowmelt, groundwater) converge, creating a complex mosaic of stream sites with varying levels of glacial influence and environmental conditions. {T}his environmental heterogeneity, in turn, influences the assemblage and composition of aquatic communities and produces complex patterns of species diversity at the catchment scale. {O}bjectives: {I}n this contribution, we assessed biodiversity and community composition of aquatic macroinvertebrate communities from 51 stream site types in a glacierised catchment in the tropical {A}ndes. {T}he aim of our study was to: (1) determine diversity, rarity, commonness and spatial distribution patterns of aquatic macroinvertebrate communities from sites with different water sources, and (2) identify which environmental variables influence the density and presence of macroinvertebrate taxa and, in particular, of the subfamilies of the ubiquitous chironomids. {M}ethods: {O}ur study sites were grouped according to their water source and to their percentage of glacier coverage in the catchment ({GCC}). {A}t each site we sampled aquatic macroinvertebrates, measured environmental variables and assessed community differences and environmental influence with ordination analyses and generalized linear models. {R}esults: {K}ryal and mixed sites had an important proportion of rare taxa. {M}ean richness was highest in the mixed sites and lowest in the sites with the highest glacier cover; while sites with an intermediate percentage of glacier cover, had the highest values of alpha and beta diversity. {W}e found that 13 taxa (15.9%) were common to all stream site types. {SIMPER} analysis showed that {O}rthocladiinae, {H}yalella sp. and {A}ndesiops sp. contributed the most to the dissimilarity between site types (> 45% of cumulative contribution). {RDA} showed that kryal sites were associated with high turbidity and density of {P}odonomids, and with low temperature, amount of {CPOM} and densities of both {A}nomalocosmoecus sp. and {A}ndesiops sp. {O}rthocladinae was associated with high current velocity and chlorophyll a concentration, whereas {H}yalella sp. had a positive relationship with higher p{H} and streambed stability. {G}eneralized linear models showed that {GCC} was the main variable explaining all faunal metrics. {C}urrent velocity explained macroinvertebrate abundance, water temperature was related to chironomid density and chlorophyll a influenced {O}rthocladiinae presence-absence. {C}onclusions: {O}ur results suggest that by favoring the presence of rare taxa and taxa turnover, glacier influence may increase biodiversity in glacierised catchments. {I}n terms of biodiversity conservation, this study confirms an urgent need to increase knowledge of high-{A}ndean stream biodiversity, especially in highly heterogenous glacierised catchments, to better describe regional biodiversity patterns and community composition of these highly vulnerable freshwater ecosystems. {D}etailed analyses of benthic communities and development of databases are key for conservation strategies. {W}ater management municipalities and/or enterprises should consider water quality and stream types for more sustainable management of these important ecosystems.},
  keywords = {aquatic macroinvertebrates ; glacierised catchments ; krenal ; kryal ; rarity ; rhithral ; {EQUATEUR} ; {ANDES} ; {ANTISANA} {MONT} ; {ANTISANA} {COURS} {D}'{EAU}},
  booktitle = {},
  journal = {{R}evista de {B}iologia {T}ropical},
  volume = {68},
  numero = {2},
  pages = {{S}29--{S}53},
  ISSN = {0034-7744},
  year = {2020},
  DOI = {10.15517/{RBT}.{V}68{IS}2.44331},
  URL = {https://www.documentation.ird.fr/hor/fdi:010080601},
}