UKUğur Kezik

Uğur Kezik

*This is an algorithmically generated author record based on publicly available information.

Current Organizations / Institutes

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Previous Organizations / Institutes

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Uğur Kezik has a total of 13 co-authors. Here are the top co-authors by number of shared publications:


Latest Publications

  • Orman Ekosistemlerinde Dinamik Süreçler ve Yönetim Paradigmaları

    by Uğur Kezik, Beyzanur Aydın, Mehmet Küçük, Arzu Ergül Bozkurt, Engin Güvendi, Murat Han Ertuğrul

    Ormanlar değişiyor; onları yönetme biçimimizin de değişmesi gerekiyor. İklim değişikliği, istilacı türler, arazi kullanımı baskıları ve artan ekolojik stres, orman ekosistemlerinin işleyişini yeniden şekillendirmektedir. Bu kitap, söz konusu dinamik süreçleri bilimsel temelde ele alarak güncel yönetim yaklaşımlarına yeni bir bakış sunmaktadır. Kitapta; • Yaprak alan indeksi ile ekosistem işlevlerinin nicelleştirilmesi ve akıllı ormancılık uygulamaları, • İklim değişikliğinin tıbbi ve aromatik bitkilerin yayılışı üzerindeki etkileri, • Borçka (Artvin) örneğinde tarım arazilerinde odunsu tür çeşitliliği ve istilacı tür riski, • İklim, su, toprak ve vejetasyon etkileşimlerine dayalı, ekolojik stres ve dirençlilik odaklı bütünleşik bir yönetim çerçevesi ele alınmaktadır. Ölçekler arası bağlantıları kuran, kuramsal tartışmayı alan çalışmalarıyla buluşturan bu eser; orman mühendisleri, ekologlar, çevre bilimcileri, planlamacılar, akademisyenler ve lisansüstü öğrenciler için güncel ve kapsamlı bir başvuru kaynağıdır. Sürdürülebilir orman yönetiminin geleceğini anlamak isteyenler için bir rehber.

  • Open Access

    Soil Carbon and Microbial Functioning Reveal Multidimensional Patterns Across a Cedrus libani Afforestation Chronosequence in Mediterranean Karst

    by Emre Babur, Burak Yalçıntaş, Yasin Taha Ünsal, Uğur Kezik, Bülent Akgün, Emre Yazar

    Afforestation assessments in Mediterranean karst regions often focus on vegetation and soil carbon, paying less attention to microbial activity. We examined the surface soil properties of a four-site Cedrus libani chronosequence in southern Turkey. In October 2024, topsoil (0–10 cm deep) was sampled at one degraded reference site and three plantation sites aged approximately 9, 14 and 24 years (15 samples were taken from each site). The afforested sites generally exhibited higher levels of soil organic carbon, total nitrogen, aggregate stability and microbial biomass carbon (MBC). Mean MBC ranged from 288 to 536 mg C kg−1 at afforested sites versus 180 mg C kg−1 at the reference site. Basal respiration was lower (0.30–0.36 versus 0.96 µg CO2-C g−1 h−1), as was biomass-specific respiration (qCO2: 0.54–1.39 versus 5.41 mg CO2-C g−1 MBC h−1). The microbial quotient did not differ significantly. The pooled MBC–respiration association was weak, whereas the site-adjusted association was positive. Multivariate patterns and the non-monotonic ordering of sites highlighted edaphic heterogeneity. As plantation age was completely confounded with site identity, these single-campaign observations cannot establish causal temporal effects. Nevertheless, integrating structural, chemical and microbial indicators provides complementary information for characterizing soil conditions across these karst sites.

  • Open Access

    Soil Carbon Storage and Microbial Functioning Across a Cedrus libani Afforestation Chronosequence in Mediterranean Karst

    by Emre Babur, Burak Yalçıntaş, Yasin Taha Ünsal, Uğur Kezik, Bülent Akgün, Emre Yazar

    Afforestation is widely used to restore degraded Mediterranean landscapes, yet restoration success is often evaluated using vegetation establishment or soil carbon accumulation, with less attention to belowground ecosystem functioning. We assessed whether Cedrus libani afforestation promotes soil functional recovery in degraded Mediterranean karst and whether structural and microbial indicators provide robust measures of restoration progress under edaphic heterogeneity. Topsoil (0–10 cm) was sampled from degraded non-afforested reference land and 10-, 15-, and 25-year-old plantations in southern Türkiye. Soil organic carbon (SOC), total nitrogen (TN), aggregate stability, microbial biomass carbon (MBC), basal respiration, microbial quotient (qMic), and metabolic quotient (qCO₂) were determined. Afforested soils had higher SOC (1.55% vs. 2.37–3.35%), TN (0.053% vs. 0.087–0.190%), aggregate stability (61.3% vs. 77.8–84.9%), and MBC (180 vs. 288–536 µg g⁻¹), whereas basal respiration declined from 0.96 to 0.30–0.36 µg CO₂–C g⁻¹ h⁻¹ and qCO₂ from 5.41 to 0.54–1.39. qMic did not differ significantly among chronosequence classes. MBC was strongly associated with SOC (ρ = 0.917, P < 0.001) but not with basal respiration (ρ = −0.075, P = 0.57). Sensitivity analyses accounting for carbonate content and pH showed that aggregate stability, basal respiration, and qCO₂ were comparatively robust, whereas SOC, TN, and MBC responses were partly substrate-dependent. Multivariate analyses revealed coordinated but non-monotonic shifts across the chronosequence. These findings indicate that restoration outcomes in Mediterranean karst cannot be assessed from carbon accumulation alone and that integrating microbial metabolic and structural indicators with edaphic information provides a more informative framework for monitoring afforestation success.

  • Open Access

    METHODOLOGICAL ASPECTS OF LUNG ACOUSTIC IMPEDANSOMETRY

    by Sergey P. Dragan, Aleksey V. Bogomolov, Vladimir I. Kezik, Sergey V. Drozdov

    Обоснование. Пандемия, обусловленная новой коронавирусной инфекцией, обусловила актуальность развития неинвазивных методов экспресс-исследования функции внешнего дыхания в интересах медицинской диагностики и разработки средств индивидуальной защиты от инфекционных заболеваний, передающихся воздушно-капельным путем. Цель. Целью исследования являлось изучение возможности повышения информативности диагностики состояния дыхательной системы путем измерения акустического импеданса модернизированным методом двух микрофонов. Материалы и методы. Экспериментальное изучение импедансных и биофизических характеристик легких проведено на группах здоровых (12 голов) и больных пневмонией (7 голов) кроликов-самцов весом 2,5-3 кг. Для исследования акустических характеристик легких использован прямой метод импедансометрии, основанный на двухмикрофонной технике измерений, определение биофизических показателей легких основано на измерении их веса и объема. Результаты. Экспериментально установлен факт увеличения активных потерь энергии низкочастотных акустических колебаний при их распространении в дыхательной системе, что позволяет создать информативный критерий диагностики ее состояния. При обследовании здоровых легких с применением акустической импедансометрии активные потери энергии акустических колебаний на низких частотах не должны существенно отличаться от соответствующих значений потерь энергии таких колебаний на резонансной частоте. При нарушениях проводимости воздухоносных путей или при наличии экссудата в легких активные потери на низких частотах будут существенно превышать потери на резонансной частоте: чем хуже состояние легких, тем выше будут потери. Установлено, что наличие в легких полости, имеющей собственную резонансную частоту, приводит к снижению резистанса дыхательной системы на этих частотах. Заключение. Экспериментально зарегистрированный факт снижения резистанса на частотах ниже резонансной частоты дыхательной системы позволяет объяснить недостаточную диагностическую информативность импульсной осциллометрии. Для повышения чувствительности и специфичности импульсной осциллометрии необходимо не ограничиваться определением акустических показателей только на частотах 5 и 20 Гц, а определять их в расширенном диапазоне частот c более детализированным шагом.