Çağatay Tavşanoğlu

Çağatay Tavşanoğlu
Hacettepe University · Department of Biology

Ph.D.

About

81
Publications
60,164
Reads
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1,827
Citations
Additional affiliations
March 2020 - present
Hacettepe University
Position
  • Professor (Full)
July 2019 - November 2019
Spanish National Research Council
Position
  • Researcher
June 2017 - July 2017
Spanish National Research Council
Position
  • Researcher
Education
February 2002 - February 2008
Hacettepe University
Field of study
  • Ecology

Publications

Publications (81)
Article
In this study, we aimed to use tree-ring based fire reconstruction to understand the spatiotemporal patterns of past fires in different climate types of western Anatolia. We collected fire scarred wood samples from living trees as wedges and remnant woods from ten sites along a transect that represents a continental to Mediterranean climate gradien...
Article
Full-text available
The Mediterranean Basin has distinct vegetation types shaped by fire, herbivory, and various human activities. Based on data from 83 belt transects of 10 × 40 m in 28 study sites for five physiognomic vegetation types (semi-closed forest, open forest, closed shrubland, open shrubland, and scrubland) in southwestern Anatolia (Turkey), we analyzed wo...
Article
The Mediterranean Basin has distinct vegetation types shaped by fire, herbivory, and various human activities. Based on data from 83 belt transects of 10 × 40 m in 28 study sites for five physiognomic vegetation types (semi-closed forest, open forest, closed shrubland, open shrubland, and scrubland) in southwestern Anatolia (Turkey), we analyzed wo...
Preprint
Full-text available
Türkiye, yaklaşık 203,000 hektar alanın yandığı 2021'de orman yangınlarından çok fazla etkilendi (1). Yanan alanların çoğu Akdeniz Pinus brutia (Kızılçam) ormanlarıyla kaplıydı ve şiddetli yangınlar çamların çoğunun ölümüne yol açtı (2). Bununla birlikte, bu ağaç türü, yangının ısısı tohumları serbest bırakana kadar onları içinde tutan belli sayıda...
Article
How plant communities in Anatolian steppes recover after disturbances has remained unknown. To study the effects of small-scale disturbances on plant communities of the central Anatolian steppe, we established thirty-two plots 1 × 1 m in size in a natural steppe near Ankara (Turkey). The plots were subjected to mowing or hoeing treatments represent...
Article
• Available studies are far from giving a complete figure for the germination requirements of many Mediterranean Basin species. • In this study, we investigated the germination properties of Lavandula stoechas L. (Lamiaceae) in response to different light and temperature regimes. We performed comprehensive experiments to test the effect of fixed an...
Technical Report
Full-text available
Orman yangınlarının sebepleri ve sonrasında yapılması gerekenler konusunda Hacettepe Üniversitesi için hazırlanmış olan teknik rapor
Article
Forests in the Mediterranean basin frequently experience fires due to both anthropogenic and natural causes. There are concerns that the fire season will prolong in the Mediterranean basin, the fire frequency will increase with ongoing climate change, moreover, the fire regimes will shift from surface fires to local crown fires. Here, we aim to imp...
Article
Full-text available
Reseda is an understudied genus regarding germination ecology. We studied the germination response of eight perennial Reseda species to fire related cues by performing a germination experiment including two aqueous smoke treatments (at 1:5 and 1:20 concentrations), one heat shock (100°C for 5 min.) treatment, and two corresponding controls. Smoke s...
Article
Full-text available
The brown bear (Ursus arctos L.) is an omnivorous large mammal that has an essential function in many ecosystems as a seed disperser. We studied the brown bear's role as a seed dispersal agent in a mixed temperate forest in northern Anatolia, Turkey. We collected 197 fecal samples from the field during the brown bear's active period for two consecu...
Cover Page
Full-text available
The cover image is based on the Original Article Changes in functional composition and diversity of waterbirds: The roles of water level and submerged macrophytes, by İbrahim Kaan Özgencil https://doi.org/10.1111/fwb.13531.
Presentation
Full-text available
Maquis vegetation is a Mediterranean shrubland type thatexpands across the south and west of Turkey, and composes its own habitat type as well as grows in Turkish red pine (Pinus brutia) forests as understory. Maquis habitat occupies about 6 million hectares, nearly 30 % of the Turkey’s woodlands. Since the forestry law in Turkey does not consider...
Article
• Water level and submerged macrophytes are critical players for the functioning of shallow lake ecosystems; understanding how waterbird communities respond to changes in both can have important implications for conservation and management. Here, we evaluated the effects of changes in water level and submerged macrophyte status on wintering waterbi...
Article
In recent decades, changes in fire activity have been observed in Europe. Fires can have large consequences for the provisioning of ecosystem services and for human well-being. Therefore, understanding the drivers of fire occurrence and improving the predictive capability of fire occurrence models is of utmost importance. So far, most studies have...
Article
Full-text available
Plant traits—the morphological, anatomical, physiological, biochemical and phenological characteristics of plants—determine how plants respond to environmental factors, affect other trophic levels, and influence ecosystem properties and their benefits and detriments to people. Plant trait data thus represent the basis for a vast area of research sp...
Article
Full-text available
During the last decades, climate and land use changes led to an increased prevalence of megafires in Mediterranean-type climate regions (MCRs). Here, we argue that current wildfire management policies in MCRs are destined to fail. Focused on fire suppression, these policies largely ignore ongoing climate warming and landscape-scale buildup of fuels...
Article
Full-text available
Large mammals play significant roles in shaping the trophic structure of terrestrial ecosystems and affect the form of vegetation growth in many habitats. We studied large mammal community in a Mediterranean habitat mosaic generated by fires originally dominated by pine forests. We conducted camera-trapping surveys in three study sites with differe...
Article
Full-text available
Capsule: This study documents evidence of interglacial refugia during the Last Interglacial for birds in the Mediterranean region, and emphasizes the importance of the Last Interglacial on the geographic distribution and genetic structure of Mediterranean species. Aims: We focused on the historical biogeography of the subalpine warbler complex: Su...
Article
Full-text available
Heat shock-stimulated germination is frequently considered a trait restricted to a few plant families with impermeable seed coats in the Mediterranean Basin. We aimed to ascertain this general idea by using 68 eastern Mediterranean plant taxa differing in growth form, dormancy type, and geographic distributional range. We conducted a laboratory exp...
Article
Full-text available
Explaining predator-prey relationship is crucial for implementing effective conservation practices on large mammals. The Eurasian lynx (Lynx lynx) preys on small ungulates such as roe deer (Capreolus capreolus) in Europe, and on hares (Lepus spp.) in more eastern longitudes, but there is lack of information on the southernmost populations of the Eu...
Article
Full-text available
Although reforestation is frequently utilized in many Mediterranean Basin countries to restore burned Mediterranean pine woodlands, post-fire recovery of the plant community is often neglected. To compare the post-fire recovery of the plant community following active and indirect post-fire restoration techniques, we studied three post-fire regenera...
Article
Full-text available
Functional trait databases are emerging as crucial tools for a wide range of ecological studies across the world. Here, we provide a database of functional traits for vascular plant species of the Mediterranean Basin. The database includes 25,764 individual records of 44 traits from 2,457 plant taxa distributed in 119 taxonomic families. This datab...
Article
Full-text available
The promoting effect of smoke-derived chemicals (e.g. karrikinolide and cyanohydrin) on germination in many plants from Mediterranean-type ecosystems such as South Africa and south-western Australia is well documented. However, very little is known about 1) the relative importance of different compounds and their possible interactive effects, 2) th...
Article
Full-text available
Chaenorhinum gerense is an eastern Mediterranean species with rare distribution and a large variety in plant and seed morphology. In this study, the accuracy of the taxonomic status of this species, which was initially reported by P.H. Davis as C. rubrifolium from south eastern Turkey, is discussed and the typical representatives of C. rubrifolium...
Article
Full-text available
During the Pleistocene glacial periods, the ranges of many temperate species in Europe contracted southwards to ref-ugia near the Mediterranean Basin. This study tested the 'expansion-contraction' model by applying the ecological niche modelling approach to one widespread temperate tree species, pedunculate oak, Quercus robur L., distributed across...
Article
During the Pleistocene glacial periods, the ranges of many temperate species in Europe contracted southwards to refugia near the Mediterranean Basin. This study tested the 'expansion-contraction' model by applying the ecological niche modelling approach to one widespread temperate tree species, pedunculate oak, Quercus robur L., distributed across...
Article
Full-text available
Wildland and cropland fires, which differ considerably in fire regime characteristics, have often been evaluated jointly to estimate regional or global fire regimes using satellite-based fire activity data. We hypothesised that excluding cropland fires will change the output of the models regarding the drivers of natural fire activity. We modelled...
Article
Full-text available
In this manuscript, the ecological role of wildfire is addressed, and the studies in pyrogeography, a recently emerged science branch, are summarized. Paradigm shifts in our understanding of the role of fire in natural ecosystems are mentioned, and the outcomes of these shifts in forestry applications and in ecological sciences are explained from a...
Article
Full-text available
Despite its biological richness, Anatolian steppe ecosystem is currently under threat because of human activity. Anatolian steppe vegetation had been shaped by natural disturbances such as fire and grazing in the past but has been subjected to anthropogenic disturbances such as agriculture and domestic grazing due to increased human activity since...
Article
Full-text available
In Mediterranean fire-prone ecosystems, annual species specific to post-fire habitats should have a soil seed bank and should be able to germinate after a fire. Therefore, various fire-related cues can be expected to stimulate germination in post-fire annuals. Germination patterns of the rare annual Chaenorhinum rubrifolium (Plantaginaceae) were ex...
Article
Full-text available
Many plant traits show variability within species in response to ecological gradients. In this study, we examined the variability in seed traits among ten populations of Helianthemum salicifolium (L.) Miller in An-atolia, Turkey. Since the Anatolian Peninsula has a geographic structure exhibiting longitudinal, elevational and climatic gradients, we...
Article
Full-text available
The Turkish government has announced its draft primary and secondary school curricula, which now contain no mention of evolution. Turkey's Ecology and Evolutionary Biology Society (see go.nature.com/2kgajpu) urges stakeholders, the Turkish public and the international scientific community to support reinstatement of evolution in the curriculum (com...
Article
Full-text available
Determining the relative role of various cues on seed germination in Mediterranean plants is important to understanding their response to variable conditions. We studied germination responses of 12 eastern Mediterranean Basin species (Alyssum caricum, A. minus, Carthamus dentatus, Daucus broteri, D. carota, Hypericum aviculariifolium, Muscari comos...
Article
Full-text available
Soil properties after low-intensity surface fires have relatively less studied in comparison to moderate to high-intensity crown fires. A mixed forest stand dominated by Castanea sativa (sweet chestnut), Fagus orientalis (oriental beech) and Pinus nigra ssp. pallasiana (Anatolian black pine), which had been burnt by a surface fire in December 2011...
Article
Full-text available
The role of smoke in fire-stimulated germination in the Mediterranean Basin has often been underestimated. A few records on smoke-enhanced germination are present in Mediterranean Lamiaceae species, but there is still a shortage of information to allow generalizations about this family to be made. To test the hypothesis that smoke enhances germinat...
Conference Paper
Full-text available
Giriş: Cistaceae familyasında tohumların en önemli karakteristiklerinden birisi sert ve su geçirmez bir tohum kabuğunun varlığı ve bu nedenle görülen yüksek seviyedeki fiziksel tohum dormansisidir. Bu familyaya bağlı Cistus, Fumana ve Tuberaria cinslerine ait türlerde, yangın sırasında ortaya çıkan sıcaklıkların tohum çimlenmesini uyardığı bilinmek...
Article
Full-text available
Regeneration mode is one of the key attributes determining population structure and dynamics of plant species. We investigated long-term patterns after fire in the cover of plant species in a 100-year chronosequence of burned Pinus brutia forests in a humid Mediterranean climate region in Turkey. Significant trends were present in the change of cov...
Article
Full-text available
In fire-prone environments, studying the variability of regeneration traits is important to show the potential of plant species to survive under consecutive post-fire and fire-free conditions. We studied the relationship between seed size and germination patterns in Cistus salviifolius (Cistaceae), which is a fire-follower species distributed throu...
Article
Full-text available
The role of smoke as a fire-related germination cue is well known in many parts of the world, including Mediterranean-type ecosystems; however, it has been neglected in the Mediterranean Basin (MB). We studied the germination response of 5 woody species found in the eastern MB (south-western Turkey) to smoke solutions derived from different plant s...
Conference Paper
Full-text available
Amaç: Helianthemum salicifolium türünün morfolojisi, sitolojisi, mikromorfolojisi, palinolojisi ve çimlenme ekolojisinin ortaya konması. Gereç ve Yöntemler: 2010-2011 yıllarında Türkiye genelinde yapılan arazi çalışmalarında H. salicifolium populasyonlarına ait bireyler çiçekli ve meyveli dönemlerde toplanmış, populasyonlara ait lokalite bilgileri...
Article
Full-text available
Intraspecific trait variability has a fundamental contribution to the overall trait variability. However, little is known concerning the relative role of local (e.g. disturbances and species interaction) and regional (biogeographical) processes in generating this intraspecific trait variability. While biogeographical processes enhance plant trait v...
Article
Full-text available
Turkey (Turkiye) lies at the nexus of Europe, the Middle East, Central Asia and Africa. Turkey's location, mountains, and its encirclement by three seas have resulted in high terrestrial, fresh water, and marine biodiversity. Most of Turkey's land area is covered by one of three biodiversity hotspots (Caucasus, Irano-Anatolian, and Mediterranean)....
Article
Full-text available
This study investigated the relationship between fire-related cues (heat shock and smoke) and the germination behaviour of Cistus creticus (Cistaceae) seeds under laboratory conditions. The seeds were obtained from a long-unburned Pinus brutia Ten. forest located on the Bozburun peninsula, Muǧla, Turkey. Heat treatments were carried out at 80, 100,...
Article
Full-text available
strong>Riassunto Presenza di grandi e medi mammiferi in pinete incendiate della Turchia sud-occidentale Nel periodo Novembre 2005-Agosto 2006, è stata verificata, tramite trappole fotografiche, la presenza di mammiferi di grandi e medie dimensioni in foreste di Pinus brutia integre e incendiate della Turchia sud-occidentale. Sono state ottenute f...
Article
Full-text available
The dynamics of seed production and fruit parasitism in a fire-following obligate seeder species, Cistus salviifolius L. were investigated along a post-fire successional gradient in Marmaris, southwestern Turkey. Four sites of different post-fire age (1, 5, 21 and 45 years) were studied for three consecutive years. Fruit samples were collected and...
Conference Paper
Full-text available
During the last quarter of the 20th century, demographic and land use changes caused alterations to the over-centuries established fire regime across the ‘mediterranean climate’ areas of the northern part of the Mediterranean Basin. This new fire regime was characterized by increase of the average number of fires and area burned per year and by a d...
Article
Günümüzde gerçekleşen orman yangınlarının büyük bir bölümünün insan kaynaklı nedenlere dayanıyor olmasına karşın, Akdeniz tipi ekosistemler için yangınlar, tarihsel gelişim ve ekolojik bakış açısı ile ele alındığında, ekosistem döngüsünün doğal bir bileşenidir. Yüzbinlerce yıllık gelişim süreci içinde bu ekosistemler, yangınlara karşı uyum yetenekl...
Article
Full-text available
Orman yangını, doğal ekosistemler üzerinde etkili olan çevresel bir müdahale etmeni. 20. yüzyılın başlarında, ekosistemler üzerinde yıkıcı bir etki yarattığı düşü-nülen yangınları tamamen önlemeye yönelik bir yaklaşım hakimdi. Bu yaklaşımın ana amaçlarından biri, yangınların doğadaki biyoçeşitliliği tahrip etmesini önlemekti. Uzun yıllar süren yang...
Article
Full-text available
Plant trait information is essential for understanding plant evolution, vegetation dynamics, and vegetation responses to disturbance and management. Furthermore, in Mediterranean ecosystems, changes in fire regime may be more relevant than direct changes in climatic conditions, making the knowledge of fire-related traits especially important. Thus...
Article
Full-text available
Post-fire recovery of a Pinus brutia Ten. forest on ophiolithic rocks was studied in Marmaris National Park, southwestern Turkey. Three study sites burned in different years (1999, 1995 and 1979) and a study site not burned for at least 45 years were studied from September 2000-2001. Although some opportunistic species had established in one-year-o...
Article
Full-text available
In the present study, the effect of goat browsing on the growth form of seven maquis species (Olea europea, Phillyrea latifolia, Pistacia terebinthus, Myrtus communis, Quercus coccifera, Juniperus oxycedrus and Arbutus andrachne) in the understorey of Cupressus sempervirens forest of Köprülü Kanyon National Park was examined. Seven goat folds were...
Conference Paper
Full-text available
Akdeniz Havzası, sık yangınlara maruz kalan ekosistemleri ve yangına uyum sağlamış bitki türleri ile yangının ekosistemin bütünleyici bir bileşeni olarak değerlendirilebildiği bir bölgedir. Akdeniz Havzası ormanlarında yangın sonrası kendiliğinden gençleşmenin çoğu durumda hızlı bir şekilde gerçekleştiği bilinmektedir. Ancak, özellikle son yıllarda...
Article
Full-text available
The aim of the study was to examine the effect of aspect on post-fire recovery of a mixed Lebanon cedar ( Cedrus libani A. Rich.) -Anatolian black pine ( Pinus nigra Arnold subsp. pallasiana [Lamb.] Holmboe) forest in Köprülü Kanyon National Park, southern Turkey. Study plots were randomly selected according to three main aspects within the burned...
Article
Full-text available
: The population dynamics of 2 species of Cistus L. (C. salviifolius L. and C. creticus L.) were studied along a post-fire successional gradient in Pinus brutia Ten. forests in Marmaris National Park, Turkey. The population density of Cistus spp. was 16 individual m-2 at the end of the first year after fire and then decreased exponentially (r2 = 0....
Article
Full-text available
zet Akdeniz iklimlerinin tipik bir özelliği olan yaz kuraklığı, Akdeniz havzasına bu yönde uyumsal özellikleri olan bitki türlerinin yerleşmesine neden olmuştur. Yaz kuraklığı ve havzaya erken dönem insan yerleşimi, bu bölgede yangın sıklığını artıran etmenler olduğundan Akdeniz havzasında bulunan bitki türleri yangına karşı da bazı uyumsal özellik...
Article
Full-text available
This study was conducted to determine long-term postfire changes in physical and chemical properties of soils of Pinus brutia Ten. forests in Marmaris National Park, Turkey. The synchronic method was used: three sites burned in different years (2, 6 and 22 years ago) and a control site which had not burned at least 45 years were selected to form a...
Conference Paper
Full-text available
Species diversity is one of the components of biodiversity, with genetic diversity and ecosystem diversity. The plant species of fire-prone communities of Mediterranean Basin have some adaptive traits to survive after a fire, and these communities can regenerate in a short period of time. We studied plant diversity in a postfire successional gradie...
Conference Paper
Full-text available
Fires have been important ecological force shaping landscapes and communities in Mediter-ranean ecosystems. The habitat changes caused by fire influence communities of small mammals. In this study we aimed to study species diversity of small mammal communities in plots (burned in 999, 995, 979 and unburned for at least 45 years) represented differe...

Projects

Projects (7)
Project
Maquis vegetation is a type of Mediterranean shrubland comprise high diversity of plant and animal species. Since the forestry law in Turkey doesn’t count maquis ecosystems as part of forest land, forestry management plans don’t consist any forestry implementation on maquis in terms of conservation. Therefore it is important to conduct detailed fieldwork on different maquis habitat types to reveal woody plant diversity. The results will share with related authorizes and prepare a technical report including suggestions on conservation implications.
Project
Invasive exotic plants increasingly pose a threat to native biodiversity in many parts of the world. However, they have rarely become successful in Turkey. One hypothesis suggests a highly diverse native flora avoids establishment of any potential invaders through intense competition. We aim to test this hypothesis through an experimental setup where we will use Diplotaxis tenuifolia (Brassicaceae) to emulate an invasion at its early stages. D. tenuifolia is a native perennial plant with strong competitive ability, and is considered invasive elsewhere. The experimental setup will involve varying levels of reduced species richness and/or ground cover through manipulation of the local vegetation, followed by seeding the “invader” species and then recording its fate as a function of native plant diversity.
Project
The aim is to understand the dynamics of soil, vegetation and faunal recovery after fire in Mediterranean Basin ecosystems. This is a collection of the scientific papers supported by various funding agencies and contributed by several researchers.