Data from: Complementary food resources of carnivory and frugivory affect local abundance of an omnivorous carnivore
A major unresolved question for omnivorous carnivores, like most species of bears, is to what degree are populations influenced by bottom–up (food supply) or top–down (human-caused mortality) processes. Most previous work on bear populations has focused on factors that limit survival (top–down) assu...
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fttriple:oai:gotriple.eu:50|dedup_wf_001::96f239d28d485d7cd596108e8f88860f 2023-05-15T18:41:59+02:00 Data from: Complementary food resources of carnivory and frugivory affect local abundance of an omnivorous carnivore Nielsen, Scott E. Larsen, Terrence A. Stenhouse, Gordon B. Coogan, Sean C. P. 2016-09-22 https://doi.org/10.5061/dryad.771t4 undefined unknown http://dx.doi.org/10.5061/dryad.771t4 https://dx.doi.org/10.5061/dryad.771t4 lic_creative-commons oai:services.nod.dans.knaw.nl:Products/dans:oai:easy.dans.knaw.nl:easy-dataset:95580 10.5061/dryad.771t4 oai:easy.dans.knaw.nl:easy-dataset:95580 10|eurocrisdris::fe4903425d9040f680d8610d9079ea14 10|openaire____::9e3be59865b2c1c335d32dae2fe7b254 re3data_____::r3d100000044 10|re3data_____::84e123776089ce3c7a33db98d9cd15a8 10|re3data_____::94816e6421eeb072e7742ce6a9decc5f 10|openaire____::081b82f96300b6a6e3d282bad31cb6e2 Life sciences medicine and health care resource co-limitation population abundance nutritional landscape Alberta Canada Ursus arctos envir demo Dataset https://vocabularies.coar-repositories.org/resource_types/c_ddb1/ 2016 fttriple https://doi.org/10.5061/dryad.771t4 2023-01-22T16:52:56Z A major unresolved question for omnivorous carnivores, like most species of bears, is to what degree are populations influenced by bottom–up (food supply) or top–down (human-caused mortality) processes. Most previous work on bear populations has focused on factors that limit survival (top–down) assuming little effect of food resource supply. When food resources are considered, most often they consider only the availability/supply of a single resource, particularly marine-subsidized or terrestrial sources of protein (carnivory) or alternately hard or soft mast (frugivory). Little has been done to compare the importance of each of these factors for omnivorous bears or test whether complementary resources better explain individual animal and population measures such as density, vital rates, and body size. We compared landscape patterns of digestible energy (kcal) for buffaloberry (a key source of carbohydrate) and ungulate matter (a key source of protein and lipid) to local measures in grizzly bear Ursus arctos abundance at DNA hair snag sites in west-central Alberta, Canada. We tested support for bottom–up hypotheses in either single (carnivory [meat] versus frugivory [fruit]) or complementary (additive or multiplicative) food resources, while accounting for a well-known top–down limiting factor affecting bear survival (road density). We found support for both top–down and bottom–up factors with complementary resources (co-limitation) supported over single resource supplies of either meat or fruit. Our study suggests that the availability of food resources that provide complementary nutrients is more important in predicting local bear abundance than single foods or nutrients (e.g. protein) or simply energy per se. This suggests a nutritionally multidimensional bottom–up limitation for a low density interior population of grizzly bears. Measures of local grizzly bear abundance and surrounding road density and food supplyData fields: 1) "DNA_sampling_cell_ID" is the 7x7 km cell used to allocate hair snag sites and ... Dataset Ursus arctos Unknown Canada Snag ENVELOPE(-140.371,-140.371,62.399,62.399) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
unknown |
topic |
Life sciences medicine and health care resource co-limitation population abundance nutritional landscape Alberta Canada Ursus arctos envir demo |
spellingShingle |
Life sciences medicine and health care resource co-limitation population abundance nutritional landscape Alberta Canada Ursus arctos envir demo Nielsen, Scott E. Larsen, Terrence A. Stenhouse, Gordon B. Coogan, Sean C. P. Data from: Complementary food resources of carnivory and frugivory affect local abundance of an omnivorous carnivore |
topic_facet |
Life sciences medicine and health care resource co-limitation population abundance nutritional landscape Alberta Canada Ursus arctos envir demo |
description |
A major unresolved question for omnivorous carnivores, like most species of bears, is to what degree are populations influenced by bottom–up (food supply) or top–down (human-caused mortality) processes. Most previous work on bear populations has focused on factors that limit survival (top–down) assuming little effect of food resource supply. When food resources are considered, most often they consider only the availability/supply of a single resource, particularly marine-subsidized or terrestrial sources of protein (carnivory) or alternately hard or soft mast (frugivory). Little has been done to compare the importance of each of these factors for omnivorous bears or test whether complementary resources better explain individual animal and population measures such as density, vital rates, and body size. We compared landscape patterns of digestible energy (kcal) for buffaloberry (a key source of carbohydrate) and ungulate matter (a key source of protein and lipid) to local measures in grizzly bear Ursus arctos abundance at DNA hair snag sites in west-central Alberta, Canada. We tested support for bottom–up hypotheses in either single (carnivory [meat] versus frugivory [fruit]) or complementary (additive or multiplicative) food resources, while accounting for a well-known top–down limiting factor affecting bear survival (road density). We found support for both top–down and bottom–up factors with complementary resources (co-limitation) supported over single resource supplies of either meat or fruit. Our study suggests that the availability of food resources that provide complementary nutrients is more important in predicting local bear abundance than single foods or nutrients (e.g. protein) or simply energy per se. This suggests a nutritionally multidimensional bottom–up limitation for a low density interior population of grizzly bears. Measures of local grizzly bear abundance and surrounding road density and food supplyData fields: 1) "DNA_sampling_cell_ID" is the 7x7 km cell used to allocate hair snag sites and ... |
format |
Dataset |
author |
Nielsen, Scott E. Larsen, Terrence A. Stenhouse, Gordon B. Coogan, Sean C. P. |
author_facet |
Nielsen, Scott E. Larsen, Terrence A. Stenhouse, Gordon B. Coogan, Sean C. P. |
author_sort |
Nielsen, Scott E. |
title |
Data from: Complementary food resources of carnivory and frugivory affect local abundance of an omnivorous carnivore |
title_short |
Data from: Complementary food resources of carnivory and frugivory affect local abundance of an omnivorous carnivore |
title_full |
Data from: Complementary food resources of carnivory and frugivory affect local abundance of an omnivorous carnivore |
title_fullStr |
Data from: Complementary food resources of carnivory and frugivory affect local abundance of an omnivorous carnivore |
title_full_unstemmed |
Data from: Complementary food resources of carnivory and frugivory affect local abundance of an omnivorous carnivore |
title_sort |
data from: complementary food resources of carnivory and frugivory affect local abundance of an omnivorous carnivore |
publishDate |
2016 |
url |
https://doi.org/10.5061/dryad.771t4 |
long_lat |
ENVELOPE(-140.371,-140.371,62.399,62.399) |
geographic |
Canada Snag |
geographic_facet |
Canada Snag |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_source |
oai:services.nod.dans.knaw.nl:Products/dans:oai:easy.dans.knaw.nl:easy-dataset:95580 10.5061/dryad.771t4 oai:easy.dans.knaw.nl:easy-dataset:95580 10|eurocrisdris::fe4903425d9040f680d8610d9079ea14 10|openaire____::9e3be59865b2c1c335d32dae2fe7b254 re3data_____::r3d100000044 10|re3data_____::84e123776089ce3c7a33db98d9cd15a8 10|re3data_____::94816e6421eeb072e7742ce6a9decc5f 10|openaire____::081b82f96300b6a6e3d282bad31cb6e2 |
op_relation |
http://dx.doi.org/10.5061/dryad.771t4 https://dx.doi.org/10.5061/dryad.771t4 |
op_rights |
lic_creative-commons |
op_doi |
https://doi.org/10.5061/dryad.771t4 |
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1766231568888627200 |