The scale of effect depends on operational definition of forest cover—evidence from terrestrial mammals of the Brazilian savanna
Christophe Amiot
(1, 2)
,
Cyntia Cavalcante Santos
(1, 3)
,
Damien Arvor
(4)
,
Beatriz Bellón
(1)
,
Hervé Fritz
(5, 2)
,
Clément Harmange
(1)
,
Jeffrey D D Holland
(6)
,
Isabel Melo
(3)
,
Jean-Paul Metzger
(7)
,
Pierre-Cyril Renaud
(1)
,
Fabio de Oliveira Roque
(3)
,
Franco Leandro Souza
(3)
,
Olivier Pays
(1, 8)
1
LETG-Angers -
Littoral, Environnement, Télédétection, Géomatique
2 REHABS - Reconciling Ecological and Human Adaptations for Biosphere Sustainability
3 UFMS - Universidade Federal de Mato Grosso do Sul
4 LETG - Rennes - Littoral, Environnement, Télédétection, Géomatique
5 LBBE - Laboratoire de Biométrie et Biologie Evolutive - UMR 5558
6 Purdue University [West Lafayette]
7 USP - Universidade de São Paulo = University of São Paulo
8 BIODIVAG - Biodiversité dans l’Anthropocène - Dynamique, Fonction & Gestion
2 REHABS - Reconciling Ecological and Human Adaptations for Biosphere Sustainability
3 UFMS - Universidade Federal de Mato Grosso do Sul
4 LETG - Rennes - Littoral, Environnement, Télédétection, Géomatique
5 LBBE - Laboratoire de Biométrie et Biologie Evolutive - UMR 5558
6 Purdue University [West Lafayette]
7 USP - Universidade de São Paulo = University of São Paulo
8 BIODIVAG - Biodiversité dans l’Anthropocène - Dynamique, Fonction & Gestion
Christophe Amiot
- Fonction : Auteur
- PersonId : 743579
- IdHAL : christophe-amiot
- ORCID : 0000-0002-4788-0928
Damien Arvor
- Fonction : Auteur
- PersonId : 8937
- IdHAL : damien-arvor
- ORCID : 0000-0002-3017-9625
- IdRef : 136950191
Beatriz Bellón
- Fonction : Auteur
- PersonId : 798344
- ORCID : 0000-0002-9620-6200
Hervé Fritz
- Fonction : Auteur
- PersonId : 178589
- IdHAL : herve-fritz
- ORCID : 0000-0002-7106-3661
- IdRef : 111390915
Clément Harmange
- Fonction : Auteur
- PersonId : 752614
- IdHAL : clement-harmange
- ORCID : 0000-0001-5207-021X
Pierre-Cyril Renaud
- Fonction : Auteur
- PersonId : 182392
- IdHAL : pierre-cyril-renaud
- ORCID : 0000-0003-1776-4923
- IdRef : 094987599
Olivier Pays
- Fonction : Auteur
- PersonId : 10657
- IdHAL : olivier-pays
- ORCID : 0000-0001-8268-1804
- IdRef : 112422799
Résumé
Context: Determining the appropriate scale at which to study species’ interactions with their environment is a great challenge.
Objective: We investigated the spatial extent at which landscape structure affects the occurrence of four species of terrestrial mammalian herbivores in the Brazilian savannas and examined whether those scales could be explained by species ecological traits and how forest habitat was operationally defined.
Methods: Using maps of forest cover, camera trapping and occupancy modelling, we determined the relations between three landscape metrics (percentage of forest cover, patch density and edge density) and the occurrence of four species. To determine the optimal scale of effect for each species, we computed landscape metrics at different spatial extents (from 0.5 to 10 km radius) from camera trap locations and for three forest maps, each using different operational definitions of a forest pixel: minimum of tree cover of 25, 50 or 75%.
Results: The occupancy models revealed scales of effect of 0.5 to 2 km with the scale of effect being similar among three of the species. However, the probability of a scale of effect being detected depended upon how forest is operationally defined, being greater when forest was defined with greater tree cover, particularly for forest-specialist species.
Conclusions: Besides biological traits, the way habitat is operationally defined shapes our ability to detect the scale of effects. Thus, it is necessary not to adopt a multi-scale approach, but also to use multiple operational definitions of habitat, considering particularities of how each species interact with their environment.
Format du dépôt | Fichier |
---|---|
Type de dépôt | Article dans une revue |
Titre |
en
The scale of effect depends on operational definition of forest cover—evidence from terrestrial mammals of the Brazilian savanna
|
Résumé |
en
Context: Determining the appropriate scale at which to study species’ interactions with their environment is a great challenge.
Objective: We investigated the spatial extent at which landscape structure affects the occurrence of four species of terrestrial mammalian herbivores in the Brazilian savannas and examined whether those scales could be explained by species ecological traits and how forest habitat was operationally defined.
Methods: Using maps of forest cover, camera trapping and occupancy modelling, we determined the relations between three landscape metrics (percentage of forest cover, patch density and edge density) and the occurrence of four species. To determine the optimal scale of effect for each species, we computed landscape metrics at different spatial extents (from 0.5 to 10 km radius) from camera trap locations and for three forest maps, each using different operational definitions of a forest pixel: minimum of tree cover of 25, 50 or 75%.
Results: The occupancy models revealed scales of effect of 0.5 to 2 km with the scale of effect being similar among three of the species. However, the probability of a scale of effect being detected depended upon how forest is operationally defined, being greater when forest was defined with greater tree cover, particularly for forest-specialist species.
Conclusions: Besides biological traits, the way habitat is operationally defined shapes our ability to detect the scale of effects. Thus, it is necessary not to adopt a multi-scale approach, but also to use multiple operational definitions of habitat, considering particularities of how each species interact with their environment.
|
Auteur(s) |
Christophe Amiot
1, 2
, Cyntia Cavalcante Santos
1, 3
, Damien Arvor
4
, Beatriz Bellón
1
, Hervé Fritz
5, 2
, Clément Harmange
1
, Jeffrey D D Holland
6
, Isabel Melo
3
, Jean-Paul Metzger
7
, Pierre-Cyril Renaud
1
, Fabio de Oliveira Roque
3
, Franco Leandro Souza
3
, Olivier Pays
1, 8
1
LETG-Angers -
Littoral, Environnement, Télédétection, Géomatique
( 182978 )
- France
2
REHABS -
Reconciling Ecological and Human Adaptations for Biosphere Sustainability
( 1075384 )
- NELSON MANDELA UNIVERSITY-George Campus-Madiba Drive, 06529 George-Afrique du Sud
- Afrique du Sud
3
UFMS -
Universidade Federal de Mato Grosso do Sul
( 10665 )
- Universidade Federal de Mato Grosso do Sul | Av. Costa e Silva, s/nº | Bairro Universitário | 79070-900 | Campo Grande - MS | Telefone: +55 (67) 3345-7000
- Brésil
4
LETG - Rennes -
Littoral, Environnement, Télédétection, Géomatique
( 3177 )
- Maison de la Recherche Place du Recteur Henri Le Moal 35043 RENNES CEDEX
- France
5
LBBE -
Laboratoire de Biométrie et Biologie Evolutive - UMR 5558
( 10025 )
- 43 Bld du 11 Novembre 1918 69622 VILLEURBANNE CEDEX
- France
6
Purdue University [West Lafayette]
( 147250 )
- Hovde Hall, 610 Purdue Mall, West Lafayette, IN 47907
- États-Unis
7
USP -
Universidade de São Paulo = University of São Paulo
( 7119 )
- Cidade Universitaria - 05508-090 São Paulo
- Brésil
8
BIODIVAG -
Biodiversité dans l’Anthropocène - Dynamique, Fonction & Gestion
( 1085263 )
- Université d'Angers, Faculté des Sciences - 2, Bd Lavoisier, 49045 Angers CEDEX 01
- France
|
Langue du document |
Anglais
|
Nom de la revue |
|
Vulgarisation |
Non
|
Comité de lecture |
Oui
|
Audience |
Internationale
|
Date de publication |
2021
|
Date de publication électronique |
2021-02-01
|
Volume |
36
|
Numéro |
4
|
Page/Identifiant |
973–987
|
Domaine(s) |
|
Mots-clés |
en
Brazil, Herbivore, Mammal, Multi-scale model, Spatial scale, Tree cover, Scale of response
|
DOI | 10.1007/s10980-021-01196-9 |
Origine :
Fichiers produits par l'(les) auteur(s)
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