August 14, 2022

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Bat Guts Become Less Healthy From Diet of “Fast Food” From Banana Plantations


Pallas’s long-tongued bat (Glossophaga soricina), feeding on nectar from banana timber in Costa Rica. Credit: Julian Schneider

Banana plantations are a dependable meals supply for nectar-feeding bats, however their impact on the bat’s intestine microbiota is akin to that of a quick meals eating regimen on the human intestine.

Nectar-feeding bats foraging in intensively managed banana plantations in Costa Rica have a much less numerous set of intestine microbes compared to bats feeding of their pure forest habitat or natural plantations, reveals new analysis printed right this moment in Frontiers in Ecology and Evolution. This is the primary research to indicate an affiliation between habitat alteration, sustainable agriculture, and the intestine microbiota of wildlife.

“Organic and conventional monoculture banana plantations both provide a very reliable food source for some nectar-feeding bat species. However, bats foraging in the intensively managed plantations had a reduced diversity of gut microbes, which could be a sign of gut dysbiosis, an unhealthy imbalance of its microbial symbionts,” explains Priscilla Alpízar, first creator of this research, a doctoral scholar on the Institute of Evolutionary Ecology and Conservation Genomics of the University of Ulm in Germany.

“In contrast, bats foraging in the organic banana plantations had diverse and individualized gut microbiotas that were more akin to their natural forest-foraging counterparts.”  

Glossophaga soricina

Pallas’s long-tongued bat (Glossophaga soricina), feeding on nectar from banana timber in Costa Rica. Credit: Julian Schneider

Fast meals lowers bacterial range

Gut dysbiosis is a persistent imbalance of the intestine’s microbe neighborhood and has been linked poor well being, corresponding to elevated susceptibility to sickness. Studies in people have proven {that a} eating regimen of quick meals could cause dysbiosis by lowering the range of the micro organism discovered within the intestine. This is likely one of the first research to indicate {that a} related impact can occur in wildlife.

“We wanted to explore the impact that intensive plantations consisting of vast areas of solely banana plants have on local wildlife, and to understand if sustainable agriculture has the same effects,” says Alpizar.

The researchers examined fecal samples from bats foraging in natural and intensive banana plantations, in addition to from bats feeding of their pure habitat, to seek out out which bacterial teams have been current, absent, extra widespread, or linked to a selected habitat. They additionally measured the bat’s physique situation, which included their dimension and weight.

“Bats foraging in both the conventional and organic banana plantations were larger and heavier than their forest counterparts, which suggests the plantations provide a reliable food source.” experiences Alpízar.

Loss of helpful micro organism?

“We found an interesting link between the gut microbiome composition and the condition of the bats. Some gut bacteria were only associated with bats of higher residual body mass and those from the natural forests, suggesting these microbes could play a role in fat deposition. Since bats foraging in banana plantations don’t need to fly long distances to look for food, it makes sense that these bats don’t need special help from bacteria to store fat. However, for forest-foraging bats, fat deposition is important because food is seasonal and widely distributed in patches.”

Further analysis is required to know if pesticides, or the supply of a plentiful however single meals supply, causes the adjustments to the bat’s intestine microbiota, and additional, if there are long-term penalties for the bat’s well being.

“Our study shows that more sustainable agricultural practices can have less of an impact on wildlife. Hopefully, our findings can lead the efforts to work together with producers and consumers to find more sustainable and bat-friendlier agricultural practices,” Alpízar concludes.

Reference: 23 September 2021, Frontiers in Ecology and Evolution.
DOI: 10.3389/fevo.2021.746783





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