Hakan Gür

Hakan Gür
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Hakan verified their affiliation via an institutional email.
Verified
Hakan verified their affiliation via an institutional email.
  • PhD
  • Professor (Full) at Ahi Evran University

Professor, Ahi Evran Univ. /// Postdoc Association, Univ. of Lethbridge, Canada /// Research Assistant, Hacettepe Univ.

About

49
Publications
57,527
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567
Citations
Introduction
​​I am an Associate Professor at Kırşehir Ahi Evran University. I study the evolutionary, behavioral, and physiological ecology of ground squirrels (the genus Spermophilus). My work also focuses on the effects of global climate changes on birds and mammals.​
Current institution
Ahi Evran University
Current position
  • Professor (Full)
Additional affiliations
February 2014 - present
Ahi Evran University
Position
  • Professor (Associate)
December 2008 - February 2014
Ahi Evran University
Position
  • Professor (Assistant)
October 1998 - September 2007
Hacettepe University
Position
  • Research Assistant

Publications

Publications (49)
Preprint
Full-text available
Bu metin, (1) çok kısaca iklim değişikliğine değiniyor, (2) tür dağılım modellemesi ile ilgili kavramsal çerçeveyi tartışıyor ve (3) tür dağılım modellemesi analizlerinin Wallace platformu üzerinden nasıl gerçekleştirileceğini tarif ediyor. En önemlisi, ilk olarak tür dağılım modellemesi alanına yeni girmek isteyen kişilere bir başlangıç sunmayı am...
Article
Climate and land-use changes are among the most important drivers of biodiversity loss and, moreover, their impacts on biodiversity are expected to increase further in the 21st century. In this study, the future impact of climate and land-use changes on Anatolian ground squirrels (Spermophilus xanthoprymnus) was assessed. Accordingly, a hierarchica...
Preprint
Full-text available
Climate is well known as the main driver of species distributions. In this study, I focused on Geyik Mountains and surrounding areas to illustrate how complex topography and climatic conditions have shaped the distribution patterns of species/communities and therefore the biodiversity of the Mediterranean Taurus Mountains, one of the most biologica...
Preprint
Full-text available
Climate and land-use changes are among the most important drivers of biodiversity loss and, moreover, their impacts on biodiversity are expected to increase further in the 21st century. In this study, the future impact of climate and land-use changes on Anatolian ground squirrels was assessed. Accordingly, a hierarchical approach with two steps was...
Article
The responses of Anatolian plants to global climate change have been poorly investigated. In this study, we aimed to understand how climatic oscillation during the Quaternary period helped to shape the current distribution patterns of the Anatolian endemic Noccaea iberidea, a typical representative of tragacanthic (thorny cushion) steppe communitie...
Article
The responses of Anatolian plants to global climate change have been poorly investigated. In this study, we aimed to understand how climatic oscillation during the Quaternary period helped to shape the current distribution patterns of the Anatolian endemic Noccaea iberidea, a typical representative of tragacanthic (thorny cushion) steppe communitie...
Article
Full-text available
Dünya üzerinde 1940-2004 yılları arasında 335 yeni bulaşıcı hastalık ortaya çıkmıştır. ‘Yeni ortaya çıkan bulaşıcı hastalık’ sayısı ve dolayısıyla küresel sağlık için tehdit, son yıllarda artmıştır. Bu hastalıkların çoğunluğuna hayvan kaynaklı patojenler (virüs, bakteri vb.), bunların da büyük çoğunluğuna yaban hayatı kaynaklı patojenler neden olur...
Article
Full-text available
Ecological niche modelling has been widely used in recent biogeographic studies. Naturally, it is the key component of disease biogeography, the study of the geographic distribution of infectious diseases. Disease biogeography is a new paradigm in epidemiology, and uses not just spatial patterns (the spatial distribution of disease cases), but also...
Article
Full-text available
Yer sincaplarının çoğu ve onların yakın akrabaları her yıl zorunlu olarak hibernasyona girer. Bu küçük memelilerin yıllık yaşam döngüsü, aktif sezon ve kış uykusu olarak bilinen hibernasyon olmak üzere iki ana bölümde incelenebilir.
Article
Full-text available
Anadolu yer sincapları, coğrafi ve çevresel/iklimsel farklılıklara cevap olarak, Anadolu Diyagonali’nin batısı (İç Anadolu) ile doğusu (özellikle Kuzeydoğu Anadolu, Erzurum-Kars Platosu) arasında hibernasyon örüntüsünü ve vücut büyüklüğünü de içeren birçok uyumsal varyasyon evrimleştirmiştir.
Article
Full-text available
Anadolu, biyocoğrafi olarak ilginç, ancak yeterince incelenmemiş bir bölgedir. Anadolu’nun biyolojik çeşitliliğini şekillendiren en belirgin biyocoğrafi özelliklerden biri, Anadolu Diyagonali’dir. Anadolu Diyagonali, önemli bir biyocoğrafi süreksizliğe karşılık gelir. Bu süreksizlik, özellikle sıcaklık mevsimselliği ile ilişkili çevresel süreksizli...
Article
Full-text available
Büyük kıtasal buz tabakaları, Kuzey Yarımküre’de Kuvaterner boyunca birçok kez ilerlemiş ve geri çekilmiştir. Büyük kıtasal buz tabakalarının olduğu dönemler buzul dönemler, diğer dönemler ise buzullararası dönemler olarak bilinmektedir. Buzul buzullararası döngülere eşlik eden iklim değişiklikleri, ya türlerin yer değiştirmesine, değişen çevresel...
Article
Full-text available
Understanding how species have responded to strong climatic fluctuations accompanying glacial-interglacial cycles is critical to predicting their likely responses to future climate change, and therefore can help guide conservation strategies. Using molecular phylogeography and ecological niche modelling, we aimed to understand how a newly recognize...
Presentation
Full-text available
70th GEOLOGICAL CONGRESS OF TURKEY CULTURAL GEOLOGY AND GEOLOGICAL HERITAGE 10-14 April 2017 | Ankara Turkey
Article
Full-text available
Bu yazıda, Anadolu Diyagonali ile ilişkili coğrafi ve çevresel/iklimsel farklılıklar ile ilgili olarak, Anadolu yer sincaplarının (Spermophilus xanthoprymnus) hibernasyon örüntüsü ve vücut büyüklüğü açısından sergilediği uyumsal varyasyonlar açıklanmıştır. Anahtar sözcükler: Anadolu yer sincabı, hibernasyon, Spermophilus xanthoprymnus, vücut büyük...
Article
Full-text available
Türkiye’nin Asya bölümü (Anadolu), dünyadaki 36 biyolojik çeşitlilik sıcak noktasından üçünün karşılaştığı ve etkileştiği bir bölgedir: Akdeniz Havzası, İran-Anadolu ve Kafkasya biyolojik çeşitlilik sıcak noktaları. Anadolu’nun biyolojik çeşitliliğini anlamak açısından en belirgin biyocoğrafi özelliklerden biri, uzun zamandır iç ve doğu Anadolu ara...
Research
Full-text available
Biyolojik bilimlerin penceresinden bakacak olursak, iklim değişikliği, organizmadan biyoma kadar biyolojik çeşitliliğin tüm bileşenlerini etkiler ve biyolojik çeşitlilik için önemli bir tehdittir. Yakın geçmişteki iklim değişikliği fiziksel ve biyolojik sistemleri ve insanoğlunu etkiledi, türlerin dağılımlarını, aktivitelerini, göçlerini, bolluklar...
Research
Full-text available
http://bilimvegelecek.com.tr/tag/hakan-gur/
Research
Full-text available
İklim değişikliği ve bir step hayvanı olan Anadolu yer sincabı – 2 / İklim değişikliği Anadolu yer sincabını nasıl etkiliyor?
Article
Full-text available
The Asian part of Turkey, i.e. Anatolia, is the region where three of the world’s 35 biodiversity hotspots meet, and interact: the Caucasus, Irano-Anatolian, and Mediterranean basin hotspots. One of the most distinctive biogeographic features that helps in understanding the biodiversity of Anatolia is the Anatolian diagonal, which has long been rec...
Conference Paper
The late Quaternary climatic oscillations have always been an important actor for genetic differentiation within species. These differentiation patterns can be informative to understand species’ historical demographic structure. There are a number of studies showing that many species distributed in the temperate zone have experienced range expansio...
Article
Full-text available
In this study, we re-evaluated historical demography of the Eurasian green woodpecker (Picus viridis) on the basis of previously published multi-locus mitochondrial DNA (mtDNA) data and ecological niche modelling. We particularly aimed to test glacial refugia hypothesis during climatic oscillations of the late Quaternary for the Eurasian green wood...
Conference Paper
Present-day distribution patterns of many species have been affected by rapid climatic oscillations. The climatic conditions of Late Quaternary have caused range expansion and restrictions for many species. To understand how species have responded to these conditions is important in terms of their biogeographical history. There have been three well...
Conference Paper
Hibernation is a seasonal adaptation of small mammals to survive during times of cold exposure, drought, and/or food shortages. Despite many studies on hibernation, few have examined the time structure of body temperature (Tb) before hibernation, particularly under natural conditions. Herein, using advanced analytical methods, we aimed to understan...
Article
Full-text available
Anatolian ground squirrels, Spermophilus xanthoprymnus (Bennett, 1835), are nearly endemic to Turkey. Various aspects of the biology of Anatolian ground squirrels have been studied. However, a detailed description of hibernation, with special attention to age and sex differences, has not previously been reported. Thus, in this study, we aimed to pr...
Article
Full-text available
A special issue on phylogeography and ecological niche modelling, edited by Utku PERKTAŞ from Hacettepe University, TURKEY and Hakan GÜR from Ahi Evran University, TURKEY, was published by Folia Zoologica, International Journal of Vertebrate Zoology (Publisher: Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic). This specia...
Article
Full-text available
Capsule This study is the first ever documented evidence of an interglacial refugium during the Last Interglacial for birds in Anatolia and suggests the need of a re-examination of the effects of the Last Interglacial on the geographic distribution and genetic structure of species. Aims We tested whether, in accordance with the ‘refugia within refu...
Poster
Full-text available
Ecological and Historical Biogeography of Yellow-necked Field Mice living in and around Anatolia Using Ecological Niche Modelling and Molecular Phylogeography
Article
Full-text available
The present study aimed to understand how Anatolian ground squirrels, Spermophilus xanthoprymnus (Bennett, 1835), have responded to global climate changes through the Late Quaternary glacial–interglacial cycles. Accordingly, ecological niche modelling was used, together with molecular phylogeography. Using species occurrence data compiled from fiel...
Article
Full-text available
Woolly dormice, Dryomys laniger Felten and Storch (Senckenbergiana Biol 49(6):429–435, 1968), are a small (20–30 g), omnivorous (mainly insectivorous), nocturnal glirid species endemic to Turkey. Although woolly dormice have been assumed to hibernate during winter, no information exists on body temperature patterns and use of torpor in the species....
Article
Full-text available
Over a 3-year period (1999-2001), we monitored the annual timing of reproduction and hibernation and accompanying changes in body mass of free-living Anatolian ground squirrels (Spermophilus xanthoprymnus) in steppe habitat about 50 km south of Ankara, Turkey. Adult males emerged from hibernation during March, before breeding females. Yearling male...
Poster
Full-text available
PERKTAŞ U., QUINTERO E., GÜR H. 2013. Once upon a time in Anatolia: Population history of Anatolian nuthatch. In Conference program and abstracts. International Biogeography Society 6th Biennial Meeting – 9-13 January 2013, Miami, Florida, USA (ed. by J. Hortal, K. Faller, K. Feeley, R. Field, C. Graham, F. Guilhaumon and D. Gavin), frontiers of bi...
Article
Full-text available
Predictable empirical patterns of variation in body size along spatial and environmental gradients have been documented within many species of mammals. Four main hypotheses, heat conservation, heat dissipation, primary productivity and seasonality, have been proposed to explain these patterns of variation in body size. In this study, we reported an...
Article
Full-text available
A phylogenetic comparative analysis of geographic variation in body size of an obligately hibernating marmotine species (Anatolian ground squirrels, Spermophilus xanthoprymnus) is presented in relation to environmental variables that pertain to four principal hypotheses (heat conservation, heat dissipation, primary productivity, and seasonality hyp...
Article
Full-text available
Spermophilus xanthoprymnus (Bennett, 1835), the Asia Minor ground squirrel, is a group-living, diurnal, obligately hibernating marmotine squirrel. It inhabits the steppes and alpine meadows throughout central lowland and eastern highland Anatolia and adjacent Armenia and northwestern Iran. Its preferred elevation appears to range from about 800 to...
Article
Full-text available
"Published in the special issue of the Hacettepe Journal of Biology and Chemistry, which is dedicated to Charles Darwin who changed te direction of modern thought by establishing the basis of evolutionary biology. To see this issue, please visit the following website: http://www.hjbc.hacettepe.edu.tr/issue/38/3 Note from Guest Editor, Dr. Ergi Den...
Article
Full-text available
We studied daily rhythmicity of body temperature (T b) before and during hibernation in Anatolian ground squirrels (Spermophilus xanthoprymnus) under natural and laboratory conditions using surgically implanted temperature loggers. Under both conditions, robust daily T b rhythmicity with parameters comparable to those of other ground squirrel speci...
Thesis
Full-text available
Hypotheses (ecogeographic rules) that have been proposed to explain the patterns of geographic variation in body size in relation to ecogeographic variables were examined using skull characters of adult 78 male and 95 female Anatolian ground squirrels (Spermophilus xanthoprymnus) from 10 geographic localities. Body size was estimated from a princip...
Article
Full-text available
We studied the sex ratio of a population of Anatolian ground squirrels,Spermophilus xanthoprymnus (Bennett, 1835), living in a steppe area about 50 km south of Ankara, Central Anatolia, Turkey in 1999–2001. The sex ratio among juveniles and yearlings did not differ from 1∶1, but the sex ratio among adults (≥ 2 years old) was biased toward females....
Poster
Full-text available
KART M., GÜR H. 2000. On emergence from hibernation and reproduction in Asia Minor ground squirrels. Life in the Cold, 11th International Hibernation Symposium. Jungholz, AUSTRIA. 13-18 August.

Questions

Question (1)
Question
I have been studying on Anatolian ground squirrel for about 20 years. For a while, I have also been interested in the ENM aprroach. Across its geographic distribution, I have been collecting tissue samples every about 20-40 km, and, in the meantime, occurrence records. So, I need a standard method to quantify number of populations (of occupied patches) to associate that measure with suitability obtained by ENM approach. It is difficult for me to quantify population density in a patch because I do field studies across the range. But, I have an observation that frequency of observation (encountering with an individual) tends to be high in areas of high suitability while travelling and collecting tissue samples across a region. That is, the methodology should be compatible with that I am travelling and collecting tissue samples and occurrence records across 100-200 km every day. Note that frequency of observation is also associated with time of day and season!

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