Biological traits, rather than environment, shape detection curves of large vertebrates in neotropical rainforests
Line transect surveys are widely used in Neotropical rainforests to estimate the population abundance of medium- and large-sized vertebrates. The use of indices such as encounter rate has been criticized because the probability of animal detection may fluctuate due to the heterogeneity of environmental conditions among sites. In addition, the morphological and behavioral characteristics (biological traits) of species affect their detectability. In this study, we compared the extent to which environmental conditions and species' biological traits bias abundance estimates in terra firme rainforests in French Guiana. The selected environmental conditions included both physical conditions and forest structure covariates, while the selected biological traits included the morphological and behavioral characteristics of species. We used the distance sampling method to model the detection probability as an explicit function of environmental conditions and biological traits and implemented a model selection process to determine the relative importance of each group of covariates. Biological traits contributed to the variability of animal detectability more than environmental conditions, which had only a marginal effect. Detectability was best for large animals with uniform or disruptive markings that live in groups in the canopy top. Detectability was worst for small, solitary, terrestrial animals with mottled markings. In the terra firme rainforests that represent ~80% of the Amazonia and Guianas regions, our findings support the use of relative indices such as the encounter rate to compare population abundance between sites in species-specific studies. Even though terra firme rainforests may appear similar between regions of Amazonia and the Guianas, comparability must be ensured, especially in forests disturbed by human activity. The detection probability can be used as an indicator of species' vulnerability to hunting and, thus, to the risk of local extinction. Only a few biological trait covariates are required to correctly estimate the detectability of the majority of medium- and large-sized vertebrates. Thus, a biological trait model could be useful in predicting the detection probabilities of rare, uncommon, or localized species for which few data are available to fit the detection function.
id |
dig-cirad-fr-585132 |
---|---|
record_format |
koha |
institution |
CIRAD FR |
collection |
DSpace |
country |
Francia |
countrycode |
FR |
component |
Bibliográfico |
access |
En linea |
databasecode |
dig-cirad-fr |
tag |
biblioteca |
region |
Europa del Oeste |
libraryname |
Biblioteca del CIRAD Francia |
language |
eng |
topic |
L40 - Anatomie et morphologie des animaux K01 - Foresterie - Considérations générales P01 - Conservation de la nature et ressources foncières L60 - Taxonomie et géographie animales forêt forêt tropicale humide écologie animale mammifère faune morphologie animale conformation animale distribution géographique dynamique des populations espèce en danger conservation de la diversité biologique protection de l'environnement déboisement aménagement forestier évolution biologie animale http://aims.fao.org/aos/agrovoc/c_3062 http://aims.fao.org/aos/agrovoc/c_7976 http://aims.fao.org/aos/agrovoc/c_427 http://aims.fao.org/aos/agrovoc/c_4560 http://aims.fao.org/aos/agrovoc/c_2821 http://aims.fao.org/aos/agrovoc/c_421 http://aims.fao.org/aos/agrovoc/c_29251 http://aims.fao.org/aos/agrovoc/c_5083 http://aims.fao.org/aos/agrovoc/c_6111 http://aims.fao.org/aos/agrovoc/c_2557 http://aims.fao.org/aos/agrovoc/c_33955 http://aims.fao.org/aos/agrovoc/c_15898 http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_16129 http://aims.fao.org/aos/agrovoc/c_2745 http://aims.fao.org/aos/agrovoc/c_8812 L40 - Anatomie et morphologie des animaux K01 - Foresterie - Considérations générales P01 - Conservation de la nature et ressources foncières L60 - Taxonomie et géographie animales forêt forêt tropicale humide écologie animale mammifère faune morphologie animale conformation animale distribution géographique dynamique des populations espèce en danger conservation de la diversité biologique protection de l'environnement déboisement aménagement forestier évolution biologie animale http://aims.fao.org/aos/agrovoc/c_3062 http://aims.fao.org/aos/agrovoc/c_7976 http://aims.fao.org/aos/agrovoc/c_427 http://aims.fao.org/aos/agrovoc/c_4560 http://aims.fao.org/aos/agrovoc/c_2821 http://aims.fao.org/aos/agrovoc/c_421 http://aims.fao.org/aos/agrovoc/c_29251 http://aims.fao.org/aos/agrovoc/c_5083 http://aims.fao.org/aos/agrovoc/c_6111 http://aims.fao.org/aos/agrovoc/c_2557 http://aims.fao.org/aos/agrovoc/c_33955 http://aims.fao.org/aos/agrovoc/c_15898 http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_16129 http://aims.fao.org/aos/agrovoc/c_2745 http://aims.fao.org/aos/agrovoc/c_8812 |
spellingShingle |
L40 - Anatomie et morphologie des animaux K01 - Foresterie - Considérations générales P01 - Conservation de la nature et ressources foncières L60 - Taxonomie et géographie animales forêt forêt tropicale humide écologie animale mammifère faune morphologie animale conformation animale distribution géographique dynamique des populations espèce en danger conservation de la diversité biologique protection de l'environnement déboisement aménagement forestier évolution biologie animale http://aims.fao.org/aos/agrovoc/c_3062 http://aims.fao.org/aos/agrovoc/c_7976 http://aims.fao.org/aos/agrovoc/c_427 http://aims.fao.org/aos/agrovoc/c_4560 http://aims.fao.org/aos/agrovoc/c_2821 http://aims.fao.org/aos/agrovoc/c_421 http://aims.fao.org/aos/agrovoc/c_29251 http://aims.fao.org/aos/agrovoc/c_5083 http://aims.fao.org/aos/agrovoc/c_6111 http://aims.fao.org/aos/agrovoc/c_2557 http://aims.fao.org/aos/agrovoc/c_33955 http://aims.fao.org/aos/agrovoc/c_15898 http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_16129 http://aims.fao.org/aos/agrovoc/c_2745 http://aims.fao.org/aos/agrovoc/c_8812 L40 - Anatomie et morphologie des animaux K01 - Foresterie - Considérations générales P01 - Conservation de la nature et ressources foncières L60 - Taxonomie et géographie animales forêt forêt tropicale humide écologie animale mammifère faune morphologie animale conformation animale distribution géographique dynamique des populations espèce en danger conservation de la diversité biologique protection de l'environnement déboisement aménagement forestier évolution biologie animale http://aims.fao.org/aos/agrovoc/c_3062 http://aims.fao.org/aos/agrovoc/c_7976 http://aims.fao.org/aos/agrovoc/c_427 http://aims.fao.org/aos/agrovoc/c_4560 http://aims.fao.org/aos/agrovoc/c_2821 http://aims.fao.org/aos/agrovoc/c_421 http://aims.fao.org/aos/agrovoc/c_29251 http://aims.fao.org/aos/agrovoc/c_5083 http://aims.fao.org/aos/agrovoc/c_6111 http://aims.fao.org/aos/agrovoc/c_2557 http://aims.fao.org/aos/agrovoc/c_33955 http://aims.fao.org/aos/agrovoc/c_15898 http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_16129 http://aims.fao.org/aos/agrovoc/c_2745 http://aims.fao.org/aos/agrovoc/c_8812 Denis, Thomas Richard-Hansen, Cécile Brunaux, Olivier Etienne, Marie-Pierre Guitet, Stéphane Hérault, Bruno Biological traits, rather than environment, shape detection curves of large vertebrates in neotropical rainforests |
description |
Line transect surveys are widely used in Neotropical rainforests to estimate the population abundance of medium- and large-sized vertebrates. The use of indices such as encounter rate has been criticized because the probability of animal detection may fluctuate due to the heterogeneity of environmental conditions among sites. In addition, the morphological and behavioral characteristics (biological traits) of species affect their detectability. In this study, we compared the extent to which environmental conditions and species' biological traits bias abundance estimates in terra firme rainforests in French Guiana. The selected environmental conditions included both physical conditions and forest structure covariates, while the selected biological traits included the morphological and behavioral characteristics of species. We used the distance sampling method to model the detection probability as an explicit function of environmental conditions and biological traits and implemented a model selection process to determine the relative importance of each group of covariates. Biological traits contributed to the variability of animal detectability more than environmental conditions, which had only a marginal effect. Detectability was best for large animals with uniform or disruptive markings that live in groups in the canopy top. Detectability was worst for small, solitary, terrestrial animals with mottled markings. In the terra firme rainforests that represent ~80% of the Amazonia and Guianas regions, our findings support the use of relative indices such as the encounter rate to compare population abundance between sites in species-specific studies. Even though terra firme rainforests may appear similar between regions of Amazonia and the Guianas, comparability must be ensured, especially in forests disturbed by human activity. The detection probability can be used as an indicator of species' vulnerability to hunting and, thus, to the risk of local extinction. Only a few biological trait covariates are required to correctly estimate the detectability of the majority of medium- and large-sized vertebrates. Thus, a biological trait model could be useful in predicting the detection probabilities of rare, uncommon, or localized species for which few data are available to fit the detection function. |
format |
article |
topic_facet |
L40 - Anatomie et morphologie des animaux K01 - Foresterie - Considérations générales P01 - Conservation de la nature et ressources foncières L60 - Taxonomie et géographie animales forêt forêt tropicale humide écologie animale mammifère faune morphologie animale conformation animale distribution géographique dynamique des populations espèce en danger conservation de la diversité biologique protection de l'environnement déboisement aménagement forestier évolution biologie animale http://aims.fao.org/aos/agrovoc/c_3062 http://aims.fao.org/aos/agrovoc/c_7976 http://aims.fao.org/aos/agrovoc/c_427 http://aims.fao.org/aos/agrovoc/c_4560 http://aims.fao.org/aos/agrovoc/c_2821 http://aims.fao.org/aos/agrovoc/c_421 http://aims.fao.org/aos/agrovoc/c_29251 http://aims.fao.org/aos/agrovoc/c_5083 http://aims.fao.org/aos/agrovoc/c_6111 http://aims.fao.org/aos/agrovoc/c_2557 http://aims.fao.org/aos/agrovoc/c_33955 http://aims.fao.org/aos/agrovoc/c_15898 http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_16129 http://aims.fao.org/aos/agrovoc/c_2745 http://aims.fao.org/aos/agrovoc/c_8812 |
author |
Denis, Thomas Richard-Hansen, Cécile Brunaux, Olivier Etienne, Marie-Pierre Guitet, Stéphane Hérault, Bruno |
author_facet |
Denis, Thomas Richard-Hansen, Cécile Brunaux, Olivier Etienne, Marie-Pierre Guitet, Stéphane Hérault, Bruno |
author_sort |
Denis, Thomas |
title |
Biological traits, rather than environment, shape detection curves of large vertebrates in neotropical rainforests |
title_short |
Biological traits, rather than environment, shape detection curves of large vertebrates in neotropical rainforests |
title_full |
Biological traits, rather than environment, shape detection curves of large vertebrates in neotropical rainforests |
title_fullStr |
Biological traits, rather than environment, shape detection curves of large vertebrates in neotropical rainforests |
title_full_unstemmed |
Biological traits, rather than environment, shape detection curves of large vertebrates in neotropical rainforests |
title_sort |
biological traits, rather than environment, shape detection curves of large vertebrates in neotropical rainforests |
url |
http://agritrop.cirad.fr/585132/ http://agritrop.cirad.fr/585132/1/Denis_et_al-2017-Ecological_Applications.pdf |
work_keys_str_mv |
AT denisthomas biologicaltraitsratherthanenvironmentshapedetectioncurvesoflargevertebratesinneotropicalrainforests AT richardhansencecile biologicaltraitsratherthanenvironmentshapedetectioncurvesoflargevertebratesinneotropicalrainforests AT brunauxolivier biologicaltraitsratherthanenvironmentshapedetectioncurvesoflargevertebratesinneotropicalrainforests AT etiennemariepierre biologicaltraitsratherthanenvironmentshapedetectioncurvesoflargevertebratesinneotropicalrainforests AT guitetstephane biologicaltraitsratherthanenvironmentshapedetectioncurvesoflargevertebratesinneotropicalrainforests AT heraultbruno biologicaltraitsratherthanenvironmentshapedetectioncurvesoflargevertebratesinneotropicalrainforests |
_version_ |
1792499325453991936 |
spelling |
dig-cirad-fr-5851322024-01-29T00:27:46Z http://agritrop.cirad.fr/585132/ http://agritrop.cirad.fr/585132/ Biological traits, rather than environment, shape detection curves of large vertebrates in neotropical rainforests. Denis Thomas, Richard-Hansen Cécile, Brunaux Olivier, Etienne Marie-Pierre, Guitet Stéphane, Hérault Bruno. 2017. Ecological Applications, 27 (5) : 1564-1577.https://doi.org/10.1002/eap.1549 <https://doi.org/10.1002/eap.1549> Biological traits, rather than environment, shape detection curves of large vertebrates in neotropical rainforests Denis, Thomas Richard-Hansen, Cécile Brunaux, Olivier Etienne, Marie-Pierre Guitet, Stéphane Hérault, Bruno eng 2017 Ecological Applications L40 - Anatomie et morphologie des animaux K01 - Foresterie - Considérations générales P01 - Conservation de la nature et ressources foncières L60 - Taxonomie et géographie animales forêt forêt tropicale humide écologie animale mammifère faune morphologie animale conformation animale distribution géographique dynamique des populations espèce en danger conservation de la diversité biologique protection de l'environnement déboisement aménagement forestier évolution biologie animale http://aims.fao.org/aos/agrovoc/c_3062 http://aims.fao.org/aos/agrovoc/c_7976 http://aims.fao.org/aos/agrovoc/c_427 http://aims.fao.org/aos/agrovoc/c_4560 http://aims.fao.org/aos/agrovoc/c_2821 http://aims.fao.org/aos/agrovoc/c_421 http://aims.fao.org/aos/agrovoc/c_29251 http://aims.fao.org/aos/agrovoc/c_5083 http://aims.fao.org/aos/agrovoc/c_6111 http://aims.fao.org/aos/agrovoc/c_2557 http://aims.fao.org/aos/agrovoc/c_33955 http://aims.fao.org/aos/agrovoc/c_15898 http://aims.fao.org/aos/agrovoc/c_15590 http://aims.fao.org/aos/agrovoc/c_16129 http://aims.fao.org/aos/agrovoc/c_2745 http://aims.fao.org/aos/agrovoc/c_8812 Line transect surveys are widely used in Neotropical rainforests to estimate the population abundance of medium- and large-sized vertebrates. The use of indices such as encounter rate has been criticized because the probability of animal detection may fluctuate due to the heterogeneity of environmental conditions among sites. In addition, the morphological and behavioral characteristics (biological traits) of species affect their detectability. In this study, we compared the extent to which environmental conditions and species' biological traits bias abundance estimates in terra firme rainforests in French Guiana. The selected environmental conditions included both physical conditions and forest structure covariates, while the selected biological traits included the morphological and behavioral characteristics of species. We used the distance sampling method to model the detection probability as an explicit function of environmental conditions and biological traits and implemented a model selection process to determine the relative importance of each group of covariates. Biological traits contributed to the variability of animal detectability more than environmental conditions, which had only a marginal effect. Detectability was best for large animals with uniform or disruptive markings that live in groups in the canopy top. Detectability was worst for small, solitary, terrestrial animals with mottled markings. In the terra firme rainforests that represent ~80% of the Amazonia and Guianas regions, our findings support the use of relative indices such as the encounter rate to compare population abundance between sites in species-specific studies. Even though terra firme rainforests may appear similar between regions of Amazonia and the Guianas, comparability must be ensured, especially in forests disturbed by human activity. The detection probability can be used as an indicator of species' vulnerability to hunting and, thus, to the risk of local extinction. Only a few biological trait covariates are required to correctly estimate the detectability of the majority of medium- and large-sized vertebrates. Thus, a biological trait model could be useful in predicting the detection probabilities of rare, uncommon, or localized species for which few data are available to fit the detection function. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/585132/1/Denis_et_al-2017-Ecological_Applications.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1002/eap.1549 10.1002/eap.1549 info:eu-repo/semantics/altIdentifier/doi/10.1002/eap.1549 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1002/eap.1549 info:eu-repo/semantics/dataset/purl/https://doi.org/10.5061/dryad.b031n |