Alys Granados | University of British Columbia (original) (raw)
Papers by Alys Granados
Tropical Conservation Science
Background and Research Aim African forest elephants ( Loxodonta cyclotis) are critically endange... more Background and Research Aim African forest elephants ( Loxodonta cyclotis) are critically endangered yet research on factors influencing their resource use is limited in Central Africa. We assessed the influence of fruit availability, land use types, and anthropogenic activity on forest elephant presence and relative abundance in the southwest part of the Campo-Ma’an Technical Operational Unit (CMTOU) to better understand elephant habitat use in human dominated systems and inform elephant management strategies. Methods We used 17 camera trap stations and surveyed 17 line transects to monitor forest elephant presence and relative abundance as a function of fruit availability, tree species richness, and land use types. Our study area spanned a gradient of human disturbance and included a National Park (NP), Forest Management Unit (FMU), and Community Land (CL). Results Forest elephants were more likely to occur in areas with increased fruit availability and tree species richness. Also...
Crop raiding by African elephants threatens human livelihoods and elephants, yet studies of long-... more Crop raiding by African elephants threatens human livelihoods and elephants, yet studies of long-term changes in crop raiding and effects on attitudes are lacking. The scope of perceived crop damage in three communities and local attitudes toward elephants and protected areas were surveyed in the Benoue Wildlife Conservation Area, Cameroon in 2010. Temporal changes in attitudes and perceived crop damage were estimated using previous work. The percent of households reporting elephant crop raiding increased since 1997 (58% vs. 40%). Attitudes toward Benoue National Park were positive and did not change over time, although more people today were positive toward the hunting concessions. Crop damage by elephants did not significantly influence attitudes toward the species, yet 52% reported no benefit to elephant presence in the area. Immigration likely contributed to increased reported elephant damages, hence, land use planning and the prevention of further encroachment is central to red...
Human disturbance directly affects animal populations but indirect effects of disturbance on spec... more Human disturbance directly affects animal populations but indirect effects of disturbance on species behaviors are less well understood. Camera traps provide an opportunity to investigate variation in animal behaviors across gradients of disturbance. We used camera trap data to test predictions about predator-sensitive behavior in three ungulate species (caribou Rangifer tarandus; white-tailed deer, Odocoileus virginianus; moose, Alces alces) across two boreal forest landscapes varying in disturbance. We quantified behavior as the number of camera trap photos per detection event and tested its relationship to predation risk between a landscape with greater industrial disturbance and predator abundance (Algar) and a “control” landscape with lower human and predator activity (Richardson). We also assessed the influence of predation risk and habitat on behavior across camera sites within the disturbed Algar landscape. We predicted that animals in areas with greater predation risk (more...
The responses of lowland tropical communities to climate change will critically influence global ... more The responses of lowland tropical communities to climate change will critically influence global biodiversity but remain poorly understood. If species in these systems are unable to tolerate warming, the communities—currently the most diverse on Earth—may become depauperate ('biotic attrition'). In response to temperature changes, animals can adjust their distribution in space or their activity in time, but these two components of the niche are seldom considered together. We assessed the spatio-temporal niches of rainforest mammal species in Borneo across gradients in elevation and temperature. Most species are not predicted to experience changes in spatio-temporal niche availability, even under pessimistic warming scenarios. Responses to temperature are not predictable by phylogeny but do appear to be trait-based, being much more variable in smaller-bodied taxa. General circulation models and weather station data suggest unprecedentedly high midday temperatures later in the century; predicted responses to this warming among small-bodied species range from 9% losses to 6% gains in spatio-temporal niche availability, while larger species have close to 0% predicted change. Body mass may therefore be a key ecological trait influencing the identity of climate change winners and losers. Mammal species composition will probably change in some areas as temperatures rise, but full-scale biotic attrition this century appears unlikely.
Biological Conservation, 2021
Abstract The Gunung Palung Orangutan Project has conducted research on critically endangered wild... more Abstract The Gunung Palung Orangutan Project has conducted research on critically endangered wild Bornean orangutans (Pongo pygmaeus wurmbii) since 1994 in Gunung Palung National Park, West Kalimantan, Indonesia. A major goal of our broad-ranging research on orangutan behavior and ecology is to understand how the unique rainforest environment of Southeast Asia, characterized by dramatic changes in fruit productivity due to unpredictable mast fruiting, impacts orangutan behavior, physiology, and health. Much of our research has been devoted to the development of non-invasive techniques and an integrated biology approach – using hormonal assays, fecal processing, nutritional analysis, genetics, and behavioral ecology – and has led to an increased understanding of the ecological and evolutionary pressures shaping orangutan adaptations. Our results show that the extended life history and very slow reproductive rate of orangutans are adaptations to their environment. Orangutans in the Gunung Palung landscape, as elsewhere across Borneo and Sumatra, also face a series of conservation challenges, including extensive habitat loss and the illegal pet trade. We highlight how our investigations of orangutan health status, ecosystem requirements, and the assessment of orangutan density using ground and drone nest surveys have been applied to conservation efforts. We describe our project's direct conservation interventions of public education and awareness campaigns, sustainable livelihood development, establishment of village-run customary forests, investigation of the illegal pet trade, and active engagement with Indonesian government organizations. These efforts, in concert with the development of local scientific and conservation capacity, provide a strong foundation for further conservation as orangutans face a challenging future.
Furthermore, lack of familiarity with juvenile and immature plumages and moult phenology hampers ... more Furthermore, lack of familiarity with juvenile and immature plumages and moult phenology hampers the documentation of demographic trends. Although habitat and altitudinal information associated with camera-trapping (or field sightings) may provide ecological clues for the identification of Bornean Lophura pheasants, these data should be used with caution, as little is known about their habitat use and preferences and the extent of overlap between species (Madge & McGowan 2002, Myers 2010, Table 1). Here we review an extensive collection of camera-trap images and videos as well as museum specimens of these taxa with the objective of providing an overview of morphological identification features, plumage descriptions, descriptions of moult patterns and new phenological information in order to aid future studies.
Global Ecology and Conservation
Proceedings of the Royal Society B: Biological Sciences
Journal of Animal Ecology
Tropical Conservation Science
Global Ecology and Conservation
Ecological applications : a publication of the Ecological Society of America, Jan 29, 2017
Vertebrate granivores destroy plant seeds, but whether animal-induced seed mortality alters plant... more Vertebrate granivores destroy plant seeds, but whether animal-induced seed mortality alters plant recruitment varies with habitat context, seed traits, and among granivore species. An incomplete understanding of seed predation makes it difficult to predict how widespread extirpations of vertebrate granivores in tropical forests might affect tree communities, especially in the face of habitat disturbance. Many tropical forests are simultaneously affected by animal loss as well as habitat disturbance, but the consequences of each for forest regeneration are often studied separately or additively, and usually on a single plant demographic stage. The combined impacts of these threats could affect plant recruitment in ways that are not apparent when studied in isolation. We used wire cages to exclude large (elephants), medium, (sambar deer, bearded pigs, muntjac deer) and small (porcupines, chevrotains) ground-dwelling mammalian granivores and herbivores in logged and unlogged forests in...
Proceedings. Biological sciences, Jan 25, 2017
The responses of lowland tropical communities to climate change will critically influence global ... more The responses of lowland tropical communities to climate change will critically influence global biodiversity but remain poorly understood. If species in these systems are unable to tolerate warming, the communities-currently the most diverse on Earth-may become depauperate ('biotic attrition'). In response to temperature changes, animals can adjust their distribution in space or their activity in time, but these two components of the niche are seldom considered together. We assessed the spatio-temporal niches of rainforest mammal species in Borneo across gradients in elevation and temperature. Most species are not predicted to experience changes in spatio-temporal niche availability, even under pessimistic warming scenarios. Responses to temperature are not predictable by phylogeny but do appear to be trait-based, being much more variable in smaller-bodied taxa. General circulation models and weather station data suggest unprecedentedly high midday temperatures later in the...
Page 1. Local attitudes and elephant spatial distribution in the Bénoué region, Cameroon: implica... more Page 1. Local attitudes and elephant spatial distribution in the Bénoué region, Cameroon: implications for human-elephant conflict and conservation Alys Granados A Thesis in The Department of Biology Presented in Partial Fulfillment of the Requirements ...
Mammalian Biology - Zeitschrift für Säugetierkunde, 2016
Human Dimensions of Wildlife, 2012
Tropical Conservation Science
Background and Research Aim African forest elephants ( Loxodonta cyclotis) are critically endange... more Background and Research Aim African forest elephants ( Loxodonta cyclotis) are critically endangered yet research on factors influencing their resource use is limited in Central Africa. We assessed the influence of fruit availability, land use types, and anthropogenic activity on forest elephant presence and relative abundance in the southwest part of the Campo-Ma’an Technical Operational Unit (CMTOU) to better understand elephant habitat use in human dominated systems and inform elephant management strategies. Methods We used 17 camera trap stations and surveyed 17 line transects to monitor forest elephant presence and relative abundance as a function of fruit availability, tree species richness, and land use types. Our study area spanned a gradient of human disturbance and included a National Park (NP), Forest Management Unit (FMU), and Community Land (CL). Results Forest elephants were more likely to occur in areas with increased fruit availability and tree species richness. Also...
Crop raiding by African elephants threatens human livelihoods and elephants, yet studies of long-... more Crop raiding by African elephants threatens human livelihoods and elephants, yet studies of long-term changes in crop raiding and effects on attitudes are lacking. The scope of perceived crop damage in three communities and local attitudes toward elephants and protected areas were surveyed in the Benoue Wildlife Conservation Area, Cameroon in 2010. Temporal changes in attitudes and perceived crop damage were estimated using previous work. The percent of households reporting elephant crop raiding increased since 1997 (58% vs. 40%). Attitudes toward Benoue National Park were positive and did not change over time, although more people today were positive toward the hunting concessions. Crop damage by elephants did not significantly influence attitudes toward the species, yet 52% reported no benefit to elephant presence in the area. Immigration likely contributed to increased reported elephant damages, hence, land use planning and the prevention of further encroachment is central to red...
Human disturbance directly affects animal populations but indirect effects of disturbance on spec... more Human disturbance directly affects animal populations but indirect effects of disturbance on species behaviors are less well understood. Camera traps provide an opportunity to investigate variation in animal behaviors across gradients of disturbance. We used camera trap data to test predictions about predator-sensitive behavior in three ungulate species (caribou Rangifer tarandus; white-tailed deer, Odocoileus virginianus; moose, Alces alces) across two boreal forest landscapes varying in disturbance. We quantified behavior as the number of camera trap photos per detection event and tested its relationship to predation risk between a landscape with greater industrial disturbance and predator abundance (Algar) and a “control” landscape with lower human and predator activity (Richardson). We also assessed the influence of predation risk and habitat on behavior across camera sites within the disturbed Algar landscape. We predicted that animals in areas with greater predation risk (more...
The responses of lowland tropical communities to climate change will critically influence global ... more The responses of lowland tropical communities to climate change will critically influence global biodiversity but remain poorly understood. If species in these systems are unable to tolerate warming, the communities—currently the most diverse on Earth—may become depauperate ('biotic attrition'). In response to temperature changes, animals can adjust their distribution in space or their activity in time, but these two components of the niche are seldom considered together. We assessed the spatio-temporal niches of rainforest mammal species in Borneo across gradients in elevation and temperature. Most species are not predicted to experience changes in spatio-temporal niche availability, even under pessimistic warming scenarios. Responses to temperature are not predictable by phylogeny but do appear to be trait-based, being much more variable in smaller-bodied taxa. General circulation models and weather station data suggest unprecedentedly high midday temperatures later in the century; predicted responses to this warming among small-bodied species range from 9% losses to 6% gains in spatio-temporal niche availability, while larger species have close to 0% predicted change. Body mass may therefore be a key ecological trait influencing the identity of climate change winners and losers. Mammal species composition will probably change in some areas as temperatures rise, but full-scale biotic attrition this century appears unlikely.
Biological Conservation, 2021
Abstract The Gunung Palung Orangutan Project has conducted research on critically endangered wild... more Abstract The Gunung Palung Orangutan Project has conducted research on critically endangered wild Bornean orangutans (Pongo pygmaeus wurmbii) since 1994 in Gunung Palung National Park, West Kalimantan, Indonesia. A major goal of our broad-ranging research on orangutan behavior and ecology is to understand how the unique rainforest environment of Southeast Asia, characterized by dramatic changes in fruit productivity due to unpredictable mast fruiting, impacts orangutan behavior, physiology, and health. Much of our research has been devoted to the development of non-invasive techniques and an integrated biology approach – using hormonal assays, fecal processing, nutritional analysis, genetics, and behavioral ecology – and has led to an increased understanding of the ecological and evolutionary pressures shaping orangutan adaptations. Our results show that the extended life history and very slow reproductive rate of orangutans are adaptations to their environment. Orangutans in the Gunung Palung landscape, as elsewhere across Borneo and Sumatra, also face a series of conservation challenges, including extensive habitat loss and the illegal pet trade. We highlight how our investigations of orangutan health status, ecosystem requirements, and the assessment of orangutan density using ground and drone nest surveys have been applied to conservation efforts. We describe our project's direct conservation interventions of public education and awareness campaigns, sustainable livelihood development, establishment of village-run customary forests, investigation of the illegal pet trade, and active engagement with Indonesian government organizations. These efforts, in concert with the development of local scientific and conservation capacity, provide a strong foundation for further conservation as orangutans face a challenging future.
Furthermore, lack of familiarity with juvenile and immature plumages and moult phenology hampers ... more Furthermore, lack of familiarity with juvenile and immature plumages and moult phenology hampers the documentation of demographic trends. Although habitat and altitudinal information associated with camera-trapping (or field sightings) may provide ecological clues for the identification of Bornean Lophura pheasants, these data should be used with caution, as little is known about their habitat use and preferences and the extent of overlap between species (Madge & McGowan 2002, Myers 2010, Table 1). Here we review an extensive collection of camera-trap images and videos as well as museum specimens of these taxa with the objective of providing an overview of morphological identification features, plumage descriptions, descriptions of moult patterns and new phenological information in order to aid future studies.
Global Ecology and Conservation
Proceedings of the Royal Society B: Biological Sciences
Journal of Animal Ecology
Tropical Conservation Science
Global Ecology and Conservation
Ecological applications : a publication of the Ecological Society of America, Jan 29, 2017
Vertebrate granivores destroy plant seeds, but whether animal-induced seed mortality alters plant... more Vertebrate granivores destroy plant seeds, but whether animal-induced seed mortality alters plant recruitment varies with habitat context, seed traits, and among granivore species. An incomplete understanding of seed predation makes it difficult to predict how widespread extirpations of vertebrate granivores in tropical forests might affect tree communities, especially in the face of habitat disturbance. Many tropical forests are simultaneously affected by animal loss as well as habitat disturbance, but the consequences of each for forest regeneration are often studied separately or additively, and usually on a single plant demographic stage. The combined impacts of these threats could affect plant recruitment in ways that are not apparent when studied in isolation. We used wire cages to exclude large (elephants), medium, (sambar deer, bearded pigs, muntjac deer) and small (porcupines, chevrotains) ground-dwelling mammalian granivores and herbivores in logged and unlogged forests in...
Proceedings. Biological sciences, Jan 25, 2017
The responses of lowland tropical communities to climate change will critically influence global ... more The responses of lowland tropical communities to climate change will critically influence global biodiversity but remain poorly understood. If species in these systems are unable to tolerate warming, the communities-currently the most diverse on Earth-may become depauperate ('biotic attrition'). In response to temperature changes, animals can adjust their distribution in space or their activity in time, but these two components of the niche are seldom considered together. We assessed the spatio-temporal niches of rainforest mammal species in Borneo across gradients in elevation and temperature. Most species are not predicted to experience changes in spatio-temporal niche availability, even under pessimistic warming scenarios. Responses to temperature are not predictable by phylogeny but do appear to be trait-based, being much more variable in smaller-bodied taxa. General circulation models and weather station data suggest unprecedentedly high midday temperatures later in the...
Page 1. Local attitudes and elephant spatial distribution in the Bénoué region, Cameroon: implica... more Page 1. Local attitudes and elephant spatial distribution in the Bénoué region, Cameroon: implications for human-elephant conflict and conservation Alys Granados A Thesis in The Department of Biology Presented in Partial Fulfillment of the Requirements ...
Mammalian Biology - Zeitschrift für Säugetierkunde, 2016
Human Dimensions of Wildlife, 2012