Gaps and hotspots in the state of knowledge of pinyon-juniper communities
Gaps and hotspots in the state of knowledge of pinyon-juniper communities
复制标题
松柏-杜松群落知识状况的差距和热点
DOI：
10.1016/j.foreco.2019.117628
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发表时间：
2020
影响因子：
3.7
通讯作者：
J. Bradford
中科院分区：
文献类型：
--
作者：
Jessica A. Hartsell;Stella M. Copeland;S. Munson;Bradley J. Butterfield;J. Bradford
松柏(PJ)植物群落覆盖北美大片地区，为野生动物、生物多样性和生态系统功能以及丰富的文化资源提供了重要的栖息地。这些群落存在于不同的环境梯度、干扰机制、结构条件和物种组成，包括三种刺柏和两种松树。近几十年来，PJ社区经历了巨大的变化，为这些不同的社区确定适当的管理战略是一个日益严峻的挑战。在这里，我们调查了文献，汇编了441项研究，以描述PJ群落研究中的模式，包括时间、地理空间和气候条件，以及局部物种之间的模式。我们评估了三个重点主题的知识状态：1)历史林分动态和对干扰的反应，2)土地管理行动及其影响，以及3)未来对气候变化的潜在反应。我们发现，在我们对松柏群落的理解中，无论是在地理上还是在局部上，都存在着巨大的潜在的重要差距。干旱对东部PJ群落中的松树种赤松的影响研究较多，而对西部PJ群落中发生的单叶松的干旱影响研究较少。审查土地管理行动的研究中，最大比例的研究只衡量了一年的影响。放牧在PJ社区的地理范围内是一种常见的土地利用方式，但很少被研究。我们发现只有39项研究有关于人为气候变化影响的信息，而且大多数都集中在甜松林上。这些结果提供了一个关于PJ社区的综合视角，可以帮助自然资源管理者确定决策所需的相关知识，并帮助研究人员设计新的研究来填补重要的知识空白。
Pinyon-juniper (PJ) plant communities cover a large area across North America and provide critical habitat for wildlife, biodiversity and ecosystem functions, and rich cultural resources. These communities occur across a variety of environmental gradients, disturbance regimes, structural conditions and species compositions, including three species of juniper and two species of pinyon. PJ communities have experienced substantial changes in recent decades and identifying appropriate management strategies for these diverse communities is a growing challenge. Here, we surveyed the literature and compiled 441 studies to characterize patterns in research on PJ communities through time, across geographic space and climatic conditions, and among focal species. We evaluate the state of knowledge for three focal topics: 1) historical stand dynamics and responses to disturbance, 2) land management actions and their effects, and 3) potential future responses to changing climate. We identified large and potentially important gaps in our understanding of pinyon-juniper communities both geographically and topically. The effect of drought onPinus edulis,the pinyon pine species in eastern PJ communities was frequently addressed, while few studies focused on drought effects onPinus monophylla, which occurs in western PJ communities. The largest proportion of studies that examined land management actions only measured their effects for one year. Grazing was a common land-use across the geographic range of PJ communities yet was rarely studied. We found only 39 studies that had information on the impacts of anthropogenic climate change and most were concentrated onPinus edulis. These results provide a synthetic perspective on PJ communities that can help natural resource managers identify relevant knowledge needed for decision-making and researchers design new studies to fill important knowledge gaps.
DOI：
10.1073/pnas.0505734102
发表时间：
2005-10-18
影响因子：
11.1
作者：
Breshears, DD;Cobb, NS;Meyer, CW
通讯作者：
Meyer, CW