Seasonal intake responses in the nectar-feeding bat Glossophaga soricina

Ayala-Berdon, Jorge; Schondube, Jorge E.; Stoner, Kathryn E.

doi:10.1007/s00360-008-0335-z

Cited by 17 publications

(7 citation statements)

References 44 publications

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“…Rain has a visible effect on vegetation and the whole region. Rain leads to leaf and flower production, which in turn provides food for fauna during reproductive periods (Ayala-Berdon et al 2009, García et al 2010. The change in the system associated with the onset of rain is thus very clear in the region and has deep significance in local knowledge (Martínez-Hernández 2003, Mendoza-Varela 2010.…”

Section: Diversity Of Ecosystem Services Perceived and The Local Contextmentioning

confidence: 99%

Unraveling heterogeneity in the importance of ecosystem services: individual views of smallholders

Tauro¹,

Gómez-Baggethun²,

Garcı́a-Frapolli³

et al. 2018

E&S

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Stakeholder groups are not homogeneous across individuals and through time, especially in relation to the importance of ecosystem services. However, the approaches commonly used to characterize the average importance and values of stakeholder groups overlook the heterogeneity in the individual priorities. This heterogeneity is particularly relevant for smallholders, who play a key role in ecosystem management but are more vulnerable to globalization than owners of large plots. We analyzed the priorities differentially assigned to ecosystem services and the reasons associated with the importance attributed to those services by individual cattle ranchers on the Pacific Coast of Mexico. We interviewed 27 cattle ranchers from neighboring rural communities. The services perceived by each rancher were identified from selected regional photographs. These services were then arranged in order of importance by interviewees, who were asked to provide the reasons for their choices. We used multivariate methods to examine the relationship between priorities for services and the livelihood of the individual. Interpretative qualitative methods elicited the reasons associated with the relative importance of the prioritized services. We identified 54 different services. Overall, individuals prioritized provisioning services directly related to their ranching activity. Individuals with the highest level of education and greatest diversity of productive activities (e.g., farmer, mason, merchant) also prioritized cultural services associated with ecotourism potential. The reasons associated with the importance attributed to the prioritized services varied widely among individuals. The list of ecosystem services perceived was context-specific, strongly influenced by the salient characteristics of the ecosystem and of the ranching way of life. A generational change in livelihoods has affected priorities. The reasons behind the importance of the prioritized services were diverse among individuals. By revealing the heterogeneity among individuals, we emphasize the need to make flexible policies that integrate diverse values and contexts to accomplish smallholder inclusivity.

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Section: Diversity Of Ecosystem Services Perceived and The Local Contextmentioning

confidence: 99%

Unraveling heterogeneity in the importance of ecosystem services: individual views of smallholders

Tauro¹,

Gómez-Baggethun²,

Garcı́a-Frapolli³

et al. 2018

E&S

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“…Contrary to our expectations, we did not find an effect of T a on the energy intake of the bats at any of the sugar concentrations tested. Ayala-Berdon et al (2009) showed that G. soricina was able to increase its energy intake during the winter in semi-natural conditions in a tropical dry forest when animals faced a decrease in T a in two different seasons. The authors found that the effect of T a on energy intake when bats fed at medium to high sugar concentrations (i.e.…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, because of its smaller body mass, and the consequent impact on metabolic costs, we expected G. soricina to exhibit torpor more frequently than L. yerbabuenae at low T a , regardless of food quality. We also predicted that energy intake and the capacity to maintain a constant body mass for both species should be more affected at low T a (Ayala-Berdon et al, 2009). …”

Section: Introductionmentioning

confidence: 90%

“…Nectar abundance and quality and the T a they confront in the field limit their energetic budget. Ayala-Berdon et al (2008) found that the energy intake of three species of bats became limited when they fed on dilute nectar, and that in one species, this reduction in energy intake increased when facing low T a (Ayala-Berdon et al, 2009). While the effects that energetic constraints related to sugar concentration (Ramírez P et al, 2005;Ayala-Berdon et al, 2008, 2009, 2013, nectar availability (Kelm and von Helversen, 2007) and foraging behavior have on the physiological ecology of bats have been evaluated in the past, the role that the interaction between diet quality, which could limit energy acquisition (Martínez del Rio et al, 2001;Ayala-Berdon et al, 2008, 2009, and T a has on the use of torpor in tropical nectar-feeding bats remains poorly explored (but see Kelm and von Helversen, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Effect of diet quality and ambient temperature on the use of torpor by two species of neotropical nectar-feeding bats

Ayala-Berdon

Vázquez-Fuerte

Beamonte‐Barrientos

et al. 2017

Journal of Experimental Biology

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Neotropical bats use torpor as a strategy to save energy when they experience a low energy intake and/or low ambient temperature (T a ). Digestive physiology limits the energy intake of several glossophaginid bats, and could play an important role in the onset of torpor in these tropical animals. We measured the effect that diet quality and T a had on the use of torpor by the nectar-feeding bats Glossophaga soricina and Leptonycteris yerbabuenae. Captive bats were fed with 5% (low) or 35% (high) sucrose solutions while exposed to two different T a (17.7 and 23.2°C; low T a and high T a ) in four different treatments: (1) high sucrose:high T a , (2) high sucrose:low T a , (3) low sucrose:high T a and (4) low sucrose:low T a . We measured their energy intake, changes in body mass (ΔM b ) and skin temperature (T skin ) as response variables. Energy intake (in 10 h) was limited when both species fed on 5% sucrose, but body mass gain was only affected in G. soricina. Energy intake and T a had a negative effect on the minimum T skin of both species, and ΔM b affected the time that G. soricina used torpor. Both species remained normothermic on the high sucrose:high T a treatment, but used torpor on the other three treatments. Bats used torpor during their resting and activity periods. Leptonycteris yerbabuenae spent more time in torpor in the low sucrose:high T a treatment, while G. soricina used this strategy for longer periods of time in the high sucrose:low T a treatment. We found that diet quality and T a played an important role in the use of torpor by nectar-feeding bats.

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“…humidity, temperature) through behavioral and physiological adaptations. Examples of this are changes in diet breadth, type of food, food intake rate, patterns of habitat use, defense of feeding areas and migratory behavior [23]–[27]. Indeed, tropical bats have the capacity to enter in torpor as a response to energetic restrictions and as a mechanism for avoiding dehydration in arid zones [28], [29].…”

Section: Introductionmentioning

confidence: 99%

Phyllostomid Bat Occurrence in Successional Stages of Neotropical Dry Forests

et al. 2014

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Tropical dry forests (TDFs) are highly endangered tropical ecosystems being replaced by a complex mosaic of patches of different successional stages, agricultural fields and pasturelands. In this context, it is urgent to understand how taxa playing critical ecosystem roles respond to habitat modification. Because Phyllostomid bats provide important ecosystem services (e.g. facilitate gene flow among plant populations and promote forest regeneration), in this study we aimed to identify potential patterns on their response to TDF transformation in sites representing four different successional stages (initial, early, intermediate and late) in three Neotropical regions: México, Venezuela and Brazil. We evaluated bat occurrence at the species, ensemble (abundance) and assemblage level (species richness and composition, guild composition). We also evaluated how bat occurrence was modulated by the marked seasonality of TDFs. In general, we found high seasonal and regional specificities in phyllostomid occurrence, driven by specificities at species and guild levels. For example, highest frugivore abundance occurred in the early stage of the moistest TDF, while highest nectarivore abundance occurred in the same stage of the driest TDF. The high regional specificity of phyllostomid responses could arise from: (1) the distinctive environmental conditions of each region, (2) the specific behavior and ecological requirements of the regional bat species, (3) the composition, structure and phenological patterns of plant assemblages in the different stages, and (4) the regional landscape composition and configuration. We conclude that, in tropical seasonal environments, it is imperative to perform long-term studies considering seasonal variations in environmental conditions and plant phenology, as well as the role of landscape attributes. This approach will allow us to identify potential patterns in bat responses to habitat modification, which constitute an invaluable tool for not only bat biodiversity conservation but also for the conservation of the key ecological processes they provide.

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Seasonal intake responses in the nectar-feeding bat Glossophaga soricina

Cited by 17 publications

References 44 publications

Unraveling heterogeneity in the importance of ecosystem services: individual views of smallholders

Unraveling heterogeneity in the importance of ecosystem services: individual views of smallholders

Effect of diet quality and ambient temperature on the use of torpor by two species of neotropical nectar-feeding bats

Phyllostomid Bat Occurrence in Successional Stages of Neotropical Dry Forests

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