Seasonal patterns in the diet of frugivorous bats in the subtropical rainforests of Argentina

Sánchez, Mariano S.; Carrizo, Luz Valeria; Giannini, Norberto P.; Bárquez, Rubén M.

doi:10.1515/mammalia-2011-0059

Cited by 29 publications

(26 citation statements)

References 16 publications

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“…However, in their study, no Solanum fruits were offered at all, and only one individual was tested. In turn, we observed a strong preference of S. lilium for the fruits of Solanum, what has been observed in several dietary studies under natural conditions based on fecal analysis (e.g., Marinho-Filho 1991, Giannini 1999, Mello et al 2008a, Lobova et al 2009, Sánchez et al 2012. It is interesting to notice that the preference for Solanum observed in the present study was as marked as the previously cited studies based on the fecal samples collected in the natural habitat, even though we offered sliced fruits to the bats, which evidences the strong association between S. lilium and Solanum.…”

Section: Discussionsupporting

confidence: 84%

Interindividual variations in fruit preferences of the yellow-shouldered bat Sturnira lilium (Chiroptera: Phyllostomidae) in a cafeteria experiment

Muylaert¹,

Matos²,

Mello³

2014

Mammalia

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Abstract:In studies on frugivory and seed dispersal, it is frequently assumed that individual frugivores of the same population behave as equivalents. However, there is growing evidence from dietary studies pointing out that, in many natural populations, individuals use different subsets of the total resource pool. As heterogeneity in foraging behavior and food selection may affect the outcome of the seed dispersal process, we tested whether yellow-shouldered bats Sturnira lilium (E. Geoffroy St.-Hilaire, 1810), the key neotropical seed dispersers, show interindividual variations in fruit preferences. Thirty individuals were submitted to cafeteria trials in a flight tent, when they were offered fruits of Solanum variabile Mart. (Solanaceae) Cecropia pachystachya Trec. (Urticaceae), and Piper aduncum L. (Piperaceae), which belong to the favorite genera consumed by S. lilium. Although S. variabile had the highest consumption rates on average, there were variations among individuals in the fruits consumed in the second and third places. These findings, together with interindividual differences in foraging areas observed in the same population, may be interpreted as preliminary evidence of individual specialization. As a possible consequence, frugivorous bats of the same population, despite being all legitimate dispersers, may differ in their efficiency.

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Section: Discussionsupporting

confidence: 84%

Interindividual variations in fruit preferences of the yellow-shouldered bat Sturnira lilium (Chiroptera: Phyllostomidae) in a cafeteria experiment

Muylaert¹,

Matos²,

Mello³

2014

Mammalia

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“…As predicted, Carollia and Sturnira species dominate forests with a high richness and abundance of understory chiropterochoric plants (Fleming , Sánchez et al. ), while habitats with a poor richness and abundance of understory chiropterochoric plants contain lower richness and abundance of these bats (Saldaña‐Vázquez et al. ), and forests with lower richness and abundance of canopy chiropterochoric plants contain a lower richness and abundance of Artibeus species (Castro‐Luna et al.…”

Section: Discussionmentioning

confidence: 75%

Intrinsic and extrinsic factors affecting dietary specialization in Neotropical frugivorous bats

Saldaña‐Vázquez

2014

Mammal Review

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Frugivory is a feeding habit that evolved on two independent occasions in the order Chiroptera. In the Neotropical phyllostomid bats Carollia, Sturnira and Artibeus, this feeding habit has evolved to become specialized in the core plant taxa Piper, Solanum, and Ficus and Cecropia, respectively. I review the intrinsic factors that promote differences in diet among frugivorous bats of the genera Carollia, Sturnira and Artibeus and the interaction between these and extrinsic factors that affect bat community structure. The intrinsic factors are internal variables associated with fruit selection, body mass and nutrient digestibility that constrain the animals to exploit fruits with different morphological and nutritional characteristics. Intrinsic factors that explain frugivorous bat diet can thus drive community structure in frugivorous bats. The extrinsic factors that affect frugivorous bat community structure are associated with chiropterochoric plant phenology and composition, as well as with human activities that impact food availability. Nutritional diversity in chiropterochoric plants and the digestive capacity of frugivorous bats are key factors in understanding diet partitioning in Neotropical frugivorous bats. These factors are related to food availability and nutrition in bats and could be the major determinants of community structure of frugivorous bats in conserved and disturbed habitats.

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“…In Atlantic forests, Mello (2009) found that guild structure of Phyllostomid bats changes across months or years and that some guilds exhibit higher abundance during some months of the rainy or dry season. In seasonal forests such as those of Argentina, important resources such as arthropods and fruits have strong temporal variations (Pearson andDerr 1986, Malizia 2001), which can affect the abundance of some guilds, such as frugivorous ones (see Sánchez et al 2012a). Altogether, these lines of evidences suggest that bat assemblages of Argentina would vary over time.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, frugivorous species were differentiated by their tendency to forage mainly in the canopy or the understory. I used ecological data from literature to classify each bat species into the guild (e.g., Bonaccorso 1979, Schnitzler and Kalko 1998, Barquez et al 1999, Gardner 2007, Sandoval et al 2010b, Sánchez et al 2012a. Species richness among sites was compared using individual-based rarefaction curve; 95% of confidence interval (CI) was estimated using EcoSim (Gotelli and Entsminger 2004).…”

Section: Analysesmentioning

confidence: 99%

“…In the Yungas, Brought to you by | MIT Libraries Authenticated Download Date | 5/9/18 2:19 PM bat richness declines with latitude Díaz 2001, Ojeda et al 2008), being the limit of the southernmost distribution range for several tropical species (see Gardner 2007). Most of the studies conducted in this region have been focused on bat inventories and geographic distributions (e.g., Sandoval et al 2010a) or on biogeographical patterns and ecological aspects of the diet (e.g., Sandoval et al 2010b, Sánchez et al 2012a. These studies contributed to the resolution of several taxonomic conflicts, the identification of areas of endemism, and the recognition of different life history aspects of some species.…”

Section: Introductionmentioning

confidence: 99%

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Structure of three subtropical bat assemblages (Chiroptera) in the Andean rainforests of Argentina

Sánchez

2016

Mammalia

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I evaluated bat assemblages in terms of species richness, relative abundance, trophic guild structure, and seasonal changes at three sites along of the Southern Yungas forests. A total of 854 individuals were captured, representing 25 species of three families, with an effort of 27,138 m of mist net opened per hour. Subtropical assemblages showed a similar structure to those from tropical landmark, with a dominance of frugivorous Phyllostomid; in addition, a few species were abundant, followed by a long tail of less common species. However, subtropical sites differed due to the dominance of the genus Sturnira and the great contribution to richness of Vespertilionidae and Molossidae families. Contrary to my original expectations, the latitudinal gradient of species richness does not seem to produce significant differences in richness between the northern and the southern sites, with the central site being different. Furthermore, guild structure and captures did not change between seasons. However, I found a high variation in guild structure among sites due to changes in β diversity and latitudinal lack of species with tropical filiations. These changes generated great differences in functional structure among assemblages, with eight guilds in the north and only four in the remaining sites. Moreover, other variables, such as roost site and resource availability, climatic conditions, and particular attributes of each species, could also be important in determining local richness and guild structure.

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Seasonal patterns in the diet of frugivorous bats in the subtropical rainforests of Argentina

Cited by 29 publications

References 16 publications

Interindividual variations in fruit preferences of the yellow-shouldered bat Sturnira lilium (Chiroptera: Phyllostomidae) in a cafeteria experiment

Interindividual variations in fruit preferences of the yellow-shouldered bat Sturnira lilium (Chiroptera: Phyllostomidae) in a cafeteria experiment

Intrinsic and extrinsic factors affecting dietary specialization in Neotropical frugivorous bats

Structure of three subtropical bat assemblages (Chiroptera) in the Andean rainforests of Argentina

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