M.S. Theses

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https://digitalarchive.library.bogazici.edu.tr/handle/123456789/11739

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Browsing M.S. Theses by Subject "Bats -- Climatic factors."

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    Distribution patterns of bats in Eastern Mediterranean region through a climate change perspective
    (Thesis (M.S.)-Bogazici University. Institute of Environmental Sciences, 2010., 2010.) Keşişoğlu, Ari.; Bilgin, Raşit.
    The impact of climate change on different species has been analyzed multiple times in various geographies. The main aim of this study was to determine how climate change will affect 18 different bats species in the eastern Mediterranean region. Using presence only modelling techniques and relevant bioclimatic data forecasts according to two different climate change scenarios (A2A and B2A) of Intergovernmental Panel on Climate Change (IPCC), the potential geographic distribution of bat species in the eastern Mediterranean region for current period and the years 2020, 2050 and 2080 was modelled. The results suggest that climate change will affect bats negatively throughout the 21st century in the studied area on two fronts: i) species richness will deteriorate, and ii) the total area occupied by bats will decline. These impacts will be more severely observed in Turkey’s coastal areas, northwest Turkey, Red Sea coasts, Israel, and west of Syria and Jordan. Using only bioclimatic variables as factors and thus not using any land cover (or habitat) data was the main limitation of the study. Hence the models and results of the study present "best case" scenarios.
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    Using environmental niche modelling for investigating the modes of speciation and the impact of global climate change on the distribution of the new world Myotis bats
    (Thesis (M.S.)-Bogazici University. Institute of Environmental Sciences, 2019., 2019.) Akdoğan, Ece.; Bilgin, Raşit.
    According to recent data, an extinction event takes place in every 20 minutes inferentially, and it is estimated that the sixth mass extinction might already be happening with climate change being argued to be one of the prominent reasons. Effective and comprehensive conservation methods must be applied in order to prevent or decrease the levels of the aforementioned extinction. The predictions regarding how species distribution and abundance is affected by climate patterns play a significant role to realize conservation goals and protect the ecosystems. The same modelling approaches that are used to predict changes in species distributions in the future, due to climate change, can also be used to try to understand modes of speciation in a historical perspective of the past. The results of this study demonstrate that the 25 out of 26 New World Myotis species investigated in this study will experience range losses in the face of climate change by 2070. The results also show that the main mode of speciation in the New World bat genus Myotis was primarily allopatric, coupled with significant niche divergences. Predominantly allopatric distributions were observed for most sister species groups (four/five), and for some of the deeper nodes in the phylogeny.