Karimi Hazhir, Binford Michael, Kleindl William, Starr Gregory, Murphy Bailey A, Desai Ankur R, Fu Chiung-Shiuan, Dietze Michael C, Staudhammer Christina
Department of Biological Sciences, The University of Alabama, Tuscaloosa, AL, 35487, USA.
Department of Geography, University of Florida, FL, 32611, USA.
J Environ Manage. 2025 Feb;374:124040. doi: 10.1016/j.jenvman.2025.124040. Epub 2025 Jan 10.
Climate, environmental conditions, and management strategies are key factors affecting forest net ecosystem production (NEP). However, little is known about the relationship between management approaches and regional to continental-scale forest productivity. In this study, we utilized forests of the U.S. Southeast (SEUS) and Pacific Northwest (PNW), two ecologically and socio-politically distinct regions, to answer the question: Does management exert a stronger influence on NEP than environmental factors? We estimated Geographically Weighted Regression models of NEP derived from the Ecosystem Demography Model as a function of soil, topography, climate, and forest management practices for the period 2000-2015 using 383 and 407 10 × 10 km landscapes in SEUS and PNW, respectively. Results showed that forest management practices were important in predicting NEP only in mountainous northeastern areas of the SEUS; in the PNW, NEP had a more complex relationship with management and was positively related to ecological, preservation, and passive management. Management, topography, and soil were more strongly correlated with NEP in the PNW than in the SEUS, in which 81%, 83%, and 83% of PNW locations showed significant relationships with at least one management, topography, or soil variable, repectively. In contrast, seasonal precipitation and temperature were stronger predictors of NEP in the SEUS than other drivers, with 99% and 84% of the locations influenced by at least one seasonal temperature or precipitation variable, respectively. The findings of this study may provide a valuable framework for forest management - climate change strategies that could be extended across regional scales.
气候、环境条件和管理策略是影响森林净生态系统生产力（NEP）的关键因素。然而，对于管理方法与区域到大陆尺度森林生产力之间的关系，我们知之甚少。在本研究中，我们利用美国东南部（SEUS）和太平洋西北部（PNW）这两个在生态和社会政治方面截然不同的地区的森林，来回答以下问题：管理对NEP的影响是否比环境因素更强？我们使用分别来自SEUS和PNW的383个和407个10×10公里的景观区域，估计了2000 - 2015年期间从生态系统人口统计学模型得出的NEP的地理加权回归模型，并将其作为土壤、地形、气候和森林管理实践的函数。结果表明，森林管理实践仅在SEUS东北部山区对预测NEP很重要；在PNW，NEP与管理的关系更为复杂，且与生态、保护和被动管理呈正相关。与SEUS相比，PNW的管理、地形和土壤与NEP的相关性更强，在PNW中，分别有81%、83%和83%的区域与至少一个管理、地形或土壤变量存在显著关系。相比之下，季节性降水和温度在SEUS中比其他驱动因素更能预测NEP，分别有99%和84%的区域受到至少一个季节性温度或降水变量的影响。本研究结果可为森林管理 - 气候变化策略提供一个有价值的框架，该框架可扩展到区域尺度。
