Most bat community ecologists conceptualize insectivorous bat assemblages as comprising at least three foraging ensembles — the “open-space” ensemble, the “edge/gap” ensemble and the “narrow-space” or forest interior ensemble. The ensembles are generally characterized by different combinations of wing parameters that facilitate flight in those habitats. What’s been less clear is how species differ in performance within these ensembles, and how any differences might map to wing morphology.
That’s what Julie Senawi set out to do as part of her PhD, assessing performance of 15 species of forest interior bats through a collision-avoidance. There are a number of challenges in inferring ability from performance on tests, so we borrowed form the social sciences and applied Rasch Analysis, a latent trait modelling approach related to Item Response Theory. Details of this approach and the findings were published this week and can be requested through my researchgate page:
Senawi, J. & Kingston, T. (2019). Clutter negotiating ability in an ensemble of forest interior bats is driven by body mass. J. Exp. Biol. doi:10.1242/jeb.203950
I am the guest editor for a special issue in the journal Diversity entitled “Diversity and Conservation of Bats”. Submissions are due before 31st March 2018, so plenty of time to pull together some great papers! The scope address the following: i) the diversity and distribution of bats; ii) the effect of human activities (e.g., landuse change, hunting, roost disturbance, climate change) on bat behavior, populations, diversity, distributions, or ecosystem function; iii) drivers of human activities that threaten bats (e.g., attitudes, knowledge, perceptions, economics); and iv) conservation applications, particularly those that evaluate evidence of success.
Kendra recently published in the journal and had a good experience with them. Once the article is accepted, it is up in the issue almost immediately, and the review process was also very efficient. So, I look forward to seeing submissions.
Kendra has a paper out today, with lead author Anna Willoughby and Kevin Olival from Ecohealth Alliance, in Diversity exploring the role of roosting ecology in patterns of viral richness and sharing among bat species. The authors compiled bat-virus associations (from previously published databases) and ecological traits to investigate the importance of roosting behavior on viral richness and sharing. Cave-roosting bats do not host greater viral richness than non-cave-roosting bats, but do exhibit a greater likelihood of sharing viruses, especially between species documented as co-roosting in the same cave.
Willoughby, Anna R.; Phelps, Kendra L.; PREDICT Consortium; Olival, Kevin J. 2017. “A Comparative Analysis of Viral Richness and Viral Sharing in Cave-Roosting Bats.” Diversity 9, no. 3: 35. doi:10.3390/d9030035
Marina’s first publication from her dissertation research is online today — congrats! Marina and undergraduate co-author Rebecca Wilson pulled together and cleaned a huge dataset of Southeast Asian GBIF records. Perhaps not surprisingly, Southeast Asian bat sampling effort is spatially biased, most notably by distance to protected area. However, ecology also plays a role, with bias varying among foraging groups. A particularly novel contribution to the field was examination of how bias changed through time. The paper is OPEN ACCESS until July 5th.
Marina Fisher-Phelps, Guofeng Cao, Rebecca Wilson and Tigga Kingston. (2017) Protecting bias: Across time and ecology, open-source bat locality data are heavily biased by distance to protected area. Ecological Informatics 40: 22-34. https://doi.org/10.1016/j.ecoinf.2017.05.003.
** NOTE the current pdf on the Ecological Informatics site is missing a table. It is present in the online version. This will be corrected soon.
Ain’s wonderful paper entitled “Resource availability and roosting ecology shape reproductive phenology of rain forest insectivorous bats” is available online in Biotropica DOI: 10.1111/btp.12430 (or you can request through my Researchgate page).
Ain spent 20 months tracking reproductive activity in 11 species of female bats in a Malaysian rainforest, and is the first study to simultaneously track both available insect biomass and local weather. The findings show different reproductive patterns in cave- vs. forest-roosting bats, which we suggest may be attributed to the cost of commuting.
Ain hard at work in Malaysia, assessing reproductive status of cave- (bottom left) and forest-roosting (bottom right, top center) bats.
Nurul‐Ain Elias, Hashim Rosli, and Tigga Kingston. “Resource availability and roosting ecology shape reproductive phenology of rain forest insectivorous bats.” Biotropica (2017). DOI: 10.1111/btp.12430
Before Marina started working on spatial bias in species distribution models and the SEABCRU database, she spent a couple of summers exploring the efficacy of driven transects in detecting bats in the low bat-density habitats around Lubbock. In our arid, largely treeless, waterless plain (the study was conducted during a 4-yr drought), stationary bat detectors remain silent, and pretty much the only way to detect bat activity is by extending the spatial extent of sampling by driving. This has implications for others surveying and monitoring bats in arid environments, and her findings are out this week in the J. Arid Environments. This is open access until December 9th.
Marina Fisher-Phelps, Dylan Schwilk and Tigga Kingston. (2017). Mobile acoustic transects detect more bat activity than stationary acoustic point counts in an urban-rural landscape matrix. Journal of Arid Environments 136: 38-44. http://dx.doi.org/10.1016/j.jaridenv.2016.10.005
Treeless, waterless plain, where turbines abound. Driven transects work better than stationary points for detecting the little bat activity.