Assessing climate change impacts on the spatial distribution of Castanea sativa Mill. using ecological niche modeling

Yıl 2023, Cilt: 9 Sayı: 2, 170 - 177, 01.01.2024

Daniela Cedano Gıraldo , Derya Mumcu Küçüker

https://doi.org/10.53516/ajfr.1374398

Öz

In recent decades, ecological niche modeling (ENM) has become integral for assessing climate change impacts on species distributions. In this study we conducted a comprehensive ENM using the Kuenm R package, employing MaxEnt as the modeling algorithm, to evaluate the impact of climate change on the habitat of Castanea sativa Mill., a non-wood forest species of high commercial interest in Turkiye, within the limits of the Trabzon Regional Directorate of Forestry (RDF). Predictors related to the species' ecology were carefully selected. The Future distributions of C. sativa for 2061–2080 under Shared Socio-economic Pathways (SSPs) 1-2.6, 2-4.5, and 5-8.5 were modeled using predictions from the Hadley Centre Global Earth Model HadGEM-GC31-LL. Extensive calibration modeling with Kuenm resulted in 434 models, and the most robust model, determined by statistical significance, predictive power, and complexity, revealed a drastic reduction in suitable areas for C. sativa (ranging from 86% to 99% across SSPs). The critical values of bio1 and bio5 were identified as primary factors. Predictions suggest potential migration of C. sativa to higher latitudes or elevations seeking more favorable climatic conditions. The substantial reduction in habitat suitability, even under SSP1-2.6, poses a significant threat, emphasizing the need for urgent measures to mitigate climate change impacts and ensure the species' survival and continuity.

Anahtar Kelimeler

Non-wood forest products, climate change, environmental conditions, bioclimatic variables, Kuenm

Teşekkür

This manuscript was presented in 5th Non-Wood Forest Product Symposium and issued as only abstract in proceeding book. We deeply thank Trabzon Regional Directorate of Forestry for providing the data for the development of this study.

İklim değişiminin Castanea sativa Mill.’in konumsal dağılımı üzerindeki etkilerinin ekolojik niş modelleme kullanılarak değerlendirilmesi

Öz

Son yıllarda, ekolojik niş modelleme (ENM), iklim değişikliğinin tür dağılımları üzerindeki etkilerini değerlendirmenin ayrılmaz bir parçası haline gelmiştir. Bu çalışmada, Trabzon Orman Bölge Müdürlüğü (OBM) sınırları içerisinde, Türkiye'de ticari açıdan değerli bir odun dışı orman ürünü olan Castanea sativa Mill.'in iklim değişikliğinin habitatı üzerindeki etkisini değerlendirmek için Kuenm R paketini kullanarak ve modelleme algoritması olarak MaxEnt'i kullanan kapsamlı bir ENM gerçekleştirdik. Türün ekolojisine ilişkin tahmin ediciler dikkatle seçilmiştir. C. sativa'nın gelecekteki dağılımı (2061-2080), Hadley Centre Global Earth Model HadGEM-GC31-LL kullanılarak SSP 1-2.6, 2-4.5 ve 5-8.5 altında modellenmiştir. Kuenm ile yapılan kapsamlı kalibrasyon modellemesinde 434 model ortaya çıkmıştır. İstatistiksel anlamlılık, tahmin gücü ve karmaşıklığa göre belirlenen en uygun model, C. sativa için uygun alanlarda (SSP'ler arasında %86 ile %99 arasında değişen) ciddi bir azalma olduğunu ortaya çıkarmıştır. Bu azalma öncelikle bio1 ve bio5 değişkenlerinden kaynaklanmaktadır. Bu tahminler, C. sativa'nın daha uygun iklim koşullarını aramak için daha yüksek enlemlere veya yüksekliklere göç etme potansiyelini göstermektedir. SSP1-2.6 altında bile habitat uygunluğunun azalması, tür için ciddi bir tehdit oluşturmakta olup, iklim değişikliğinin etkilerini hafifletmek ve türün hayatta kalışını ve sürekliliğini sağlamak için acil önlemlerin alınmasını gerektirmektedir.

Anahtar Kelimeler

Odun dışı orman ürünleri, iklim değişikliği, çevre koşulları, biyoklimatik değişkenler, Kuenm

Teşekkür

This manuscript was presented in 5th Non-Wood Forest Product Symposium and issued as only abstract in proceeding book. We deeply thank Trabzon Regional Directorate of Forestry for providing the data for the development of this study.

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