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Land conversions and bioproductivity trends in semiarid regions of European Russia in the context of Land Degradation Neutrality targetsтезисы доклада Тезисы
- Автор: Telnova Natalia
- Сборник: Practical Geography and XXI Century Challenges. International Geographical Union Thematic Conference dedicated to the Centennial of the Institute of Geography of the Russian Academy of Sciences, 4–6 June 2018, Moscow. Conference Book
- Редакторы: Иванов Сергей Владимирович, Себенцов Александр Борисович, Суслова Светлана Борисовна
- Том: 1
- Тезисы
- Год издания: 2018
- Издательство: Федеральное государственное бюджетное учреждение науки Институт географии Российской академии наук
- Местоположение издательства: Москва
- Первая страница: 28
- Последняя страница: 29
- Аннотация: Semiarid steppe regions of European Russia are highly sensitive areas to land degradation under unstable precipitation regimes, widespread and versatile agricultural activities. In the context of setting and achieving land degradation neutrality (LDN) targets now adopted at the national level this regions can play a key role and be considered as a model to elaborate scientific and methodological framework for evaluation and monitoring of land-based natural capital. Our research aims at the retrospective analysis of land use/land cover changes (LULCC) and land productivity dynamics in study area for the 1992-2015. To reveal and explain the spatially explicit picture of these multidirectional trends contradictory land reforms and ongoing climate change throughout the whole area in study we use long-term time series of consistent geospatial gridded data with 300 m resolution: sum annual NDVI time series as a proxy of biological productivity of semiarid ecosystems and annual land cover maps from ESA CCI LC product. Initial global land cover classes and logically acceptable transitions between them for the period were aggregate and interpret from the point of view existing diversity of land use/land cover patterns of the study area. The spatial distribution of different types of land use\land cover changes and significant trends in sum annual NDVI are highly heterogeneous throughout the semiarid regions of European Russia. The more evident and full-scale dynamics of LULCC is revealed for the dry steppes and deserted steppes of the Northern Caucasus and Lower Volga. Between the dominant types of land transitions and consistent trends in productivity prevailed positive or neutral in context of land degradation tendencies: i) grassland expansion with strong positive NDVI trend in the 2000–2015 at the place of fully degraded in 1992-2000 rangelands in the NW Caspian region; ii) conversion from extensive pastures to productive croplands in the eastern part of Northern Caucasus. Negative trends in LULCC and NDVI are fixed mainly for the southeastern parts of study region (dry steppes of Low Zavolzhie) where transition from grasslands to sparse vegetation and consistent decline in bioproductivity can be rather explained with aridization of regional climate from the 1990s than anthropogenic activities.
- Добавил в систему: Тельнова Наталья Олеговна