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| 1 | Farmland marginalization in the mountainous areas: Characteristics, influencing factors and policy implications显示文摘基于 SPOT-5 图象, 1:1 百万张地志的地图,到森林工程和重庆森林工程的回来的农田的地图,聚会和经济统计,等等,这份报纸识别影响农田 marginalization 的特征和因素。结果出现了:(1 ) 在 20022012 期间,农田 marginalization 的率是 16.18% ,它主要在北 Qiyao 山的高区域和南部的 Qiyao 山的中等高度的区域被发现。并且这农田 marginalization 将增加,与农村劳动者的 non-agriculturalization 和留下的劳动者的老化联系了。(2 ) 举起,来自村庄的距离半径和道路连接在农田 marginalization 上有大影响。农田 marginalization 率随举起的增加显示出一个增加的趋势,并且 60.88% 全部的农田 marginalization 区域在海水平上面在比 1000 m 大的高度被发现。marginalization 趋势也从分发网络与斜坡和距离增加。(3 ) 农田区域每劳动者和农场劳动者的平均年龄是驾驶农田 marginalization 的主要因素。农田转移和小农业机械集合关于管理和生产率效率影响农田 marginalization。(4 ) 有 comparative-disadvantage-dominated marginalization 的农田说明了 55.32% 全部的农田 marginalization 区域,由地点主导的 marginalization (33.80%) 列在后面。(5 ) 根据每种真实状况的细节,不同政策被建议减轻 marginalization。一条连续 marginalization 政策将在地面主导的 marginalization 鼓励农田的回来到森林。一条 anti-marginalization 政策被建议创造新农村住所并且改进农村道路系统抵抗地面主导的 marginalization。并且另一条 anti-marginalization 政策被计划改进管理并且为 comparative-disadvantage-dominated marginalization 微机械化。一个新想法被开发与调查信息集成高分辨率遥感和统计数据在多山的区域识别陆地 marginalization 和它的驱动力。 | SHAO Jing'an ZHANG Shichao LI Xiubin | 2015 | Journal of Geographical Sciences2015，25，6： | 22 |
| 2 | Potassium isotopic signatures of modern offshore detrital sediments from different climatic regimes and the implications显示文摘Potassium isotopes are a novel tracer for continental weathering.Previous K isotope studies on chemical weathering generally targeted weathering profiles under a particular climate region,yet the effects of chemical weathering on K isotopes under different climatic backgrounds remain unclear.Moreover,little is known about the K isotope signatures of modern unconsolidated detrital sediments.Here,we report K isotopic data of surficial seafloor sediments from continental shelves along the east coast of China(ECC),as well as those around the tropical Hainan island in the northern South China Sea.The ECC sediments have a relatively narrow distribution ofδ^(41)K(with reference to NIST3141a)values,which range from(-0.40±0.01)‰to(-0.57±0.04)‰,with an average of(-0.51±0.09)‰.By contrast,δ^(41)K values of Hainan offshore sediments display a larger variation,ranging from(-0.28±0.07)‰to(-0.67±0.02)‰.Theδ^(41)K values of Hainan offshore sediments exhibit negative correlations with the chemical index of alteration(CIA),Al/K,Ti/K,and total iron(FeT),which underlines the control of chemical weathering on K isotopic signatures of detritus inputs into oceans.We also measured Mg isotope compositions for the same samples;interestingly,the variability inδ^(26)Mg of the samples is small(~0.24‰)for all ECC and Hainan offshore sediments,andδ^(26)Mg values do not show clear correlations with indexes of chemical weathering.Our study demonstrates the link between K isotopic variability of detrital sediments and climatic conditions including rainfall intensity,which indicates that K isotopes of the detrital component of marine sediments could be applied to study Earth’s climate in deep time.Theδ^(41)K values of the offshore detrital sediments are significantly less variable than those of pelagic marine sediments,highlighting the importance of distinguishing the effects of diagenesis and neoformation of clay minerals from continental weathering in attempts to study deep-time climate-weathering link by K isotopes in detrital sedimentary records. | Jun MU Tianyu CHEN Qian YU Shichao AN Jianfang CHEN Xuefa SHI Weiqiang LI | 2024 | Science China Earth Sciences2024，67，2： | 0 |
| 3 | Shortwave Radiation Calculation for Forest Plots Using Airborne LiDAR Data and Computer Graphics显示文摘Forested environments feature a highly complex radiation regime,and solar radiation is hindered from penetrating into the forest by the 3D canopy structure;hence,canopy shortwave radiation varies spatiotemporally,seasonally,and meteorologically,making the radiant flux challenging to both measure and model. | Xinbo Xue Shichao Jin Feng An Huaiqing Zhang Jiangchuan Fan Markus P.Eichhorn Chengye Jin Bangqian Chen Ling Jiang Ting Yun | 2022 | Plant Phenomics2022，4，1： | 0 |
| 4 | A Review of the Engineering Role of Burrowing Animals: Implication of Chinese Pangolin as an Ecosystem Engineer显示文摘Ecosystem engineers are organisms that alter the distribution of resources in the environment by creating,modifying,maintaining and/or destroying the habitat.They can affect the structure and function of the whole ecosystem furthermore.Burrowing engineers are an important group in ecosystem engineers as they play a critical role in soil translocation and habitat creation in various types of environment.However,few researchers have systematically summarized and analyzed the studies of burrowing engineers.We reviewing the existing ecological studies of burrowing engineer about their interaction with habitat through five directions:(1)soil turnover;(2)changing soil physicochemical properties;(3)changing plant community structure;(4)providing limited resources for commensal animals;and/or(5)affecting animal communities.The Chinese pangolin(Manis pentadactyla)is a typical example of burrowing mammals,in part(5),we focus on the interspecific relationships among burrow commensal species of Chinese pangolin.The engineering effects vary with environmental gradient,literature indicates that burrowing engineer play a stronger role in habitat transformation in the tropical and subtropical areas.The most common experiment method is comparative measurements(include different spatial and temporal scale),manipulative experiment is relatively few.We found that most of the engineering effects had positive feedback to the local ecosystem,increased plant abundance and resilience,increased biodiversity and consequently improved ecosystem functioning.With the global background of dramatic climate change and biodiversity loss in recent decades,we recommend future studies should improving knowledge of long-term engineering effects on population scale and landscape scale,exploring ecological cascades through trophic and engineering pathways,to better understand the attribute of the burrowing behavior of engineers to restore ecosystems and habitat creation.The review is presented as an aid to systematically expound the engineering effect of burrowing animals in the ecosystem,and provided new ideas and advice for planning and implementing conservation management. | Song Sun Hongliang Dou Shichao Wei Yani Fang Zexu Long Jiao Wang Fuyu An Jinqian Xu Tingting Xue Huangjie Qiu Yan Hua Guangshun Jiang | 2021 | Journal of Zoological Research2021，3，3： | 0 |
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