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Response of ecosystem carbon storage to land use change from 1985 to 2050 in the ningxia Section of Yellow River Basin,China

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Journal of Arid Land 2024年第1期16卷 110-130页

作者： LIN Yanmin HU Zhirui LI Wenhui CHEN Haonan WANG Fang NAN Xiongxiong YANG Xuelong ZHANG Wenjun College of Geographical Sciences and Planning Ningxia UniversityYinchuan 750021China China-Arab Joint International Research Laboratory for Featured Resources and Environmental Governance in Arid Region Yinchuan 750021China ningxia Land Resources Surveying and Monitoring Institute Yinchuan 750002China State Key Laboratory of Efficient Production of Forest Resources Yinchuan 750002China ningxia lingwu baijitan national nature reserve administration Yinchuan 751400China

Regional sustainable development necessitates a holistic understanding of spatiotemporal variations in ecosystem carbon storage(ECS),particularly in ecologically sensitive areas with arid and semi-arid *** this study,we calculated the ECS in the ningxia Section of Yellow River Basin,China from 1985 to 2020 using the Integrated Valuation of Ecosystem Services and Tradeoffs(InVEST)model based on land use *** further predicted the spatial distribution of ECS in 2050 under four land use scenarios:natural development scenario(NDS),ecological protection scenario(EPS),cultivated land protection scenario(CPS),and urban development scenario(UDS)using the patch-generating land use simulation(PLUS)model,and quantified the influences of natural and human factors on the spatial differentiation of ECS using the geographical detector(Geodetector).Results showed that the total ECS of the study area initially increased from 1985 until reaching a peak at 402.36×10^(6) t in 2010,followed by a decreasing trend to *** spatial distribution of ECS was characterized by high values in the eastern and southern parts of the study area,and low values in the western and northern *** 1985 and 2020,land use changes occurred mainly through the expansion of cultivated land,woodland,and construction land at the expense of unused *** total ECS in 2050 under different land use scenarios(ranked as EPS>CPS>NDS>UDS)would be lower than that in *** light was the largest contributor to the spatial differentiation of ECS,with soil type and annual mean temperature being the major natural driving *** of this study could provide guidance on the ecological construction and high-quality development in arid and semi-arid areas.

关键词： carbon storage land use change nighttime light Integrated Valuation of Ecosystem Services and Tradeoffs(InVEST)model patch-generating land use simulation(PLUS)model geographical detector(Geodetector) Yellow River Basin

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Effects of desert plant communities on soil enzyme activities and soil organic carbon in the proluvial fan in the eastern foothills of the Helan Mountain in ningxia,China

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Journal of Arid Land 2024年第5期16卷 725-737页

作者： SHEN Aihong SHI Yun MI Wenbao YUE Shaoli SHE Jie ZHANG Fenghong GUO Rui HE Hongyuan WU Tao LI Hongxia ZHAO Na College of Forestry and Prataculture of ningxia University Yinchuan 750021China School of Geography and Planning of ningxia University Yinchuan 750021China ningxia Hui Autonomous Region Agricultural Comprehensive Development Center Yinchuan 750002China ningxia Helan Mountain national nature reserve administration Yinchuan 750021China Yinchuan Yinxi Ecological Protection Forest Management Center Yinchuan 750002China

It is of great significance to study the effects of desert plants on soil enzyme activities and soil organic carbon(SOC)for maintaining the stability of the desert *** this study,we studied the responses of soil enzyme activities and SOC fractions(particulate organic carbon(POC)and mineral-associated organic carbon(MAOC))to five typical desert plant communities(Convolvulus tragacanthoides,Ephedra rhytidosperma,Stipa breviflora,Stipa tianschanica ***,and Salsola laricifolia communities)in the proluvial fan in the eastern foothills of the Helan Mountain in ningxia Hui Autonomous Region,*** recorded the plant community information mainly including the plant coverage and herb and shrub species,and obtained the aboveground biomass and plant species diversity through sample surveys in late July *** samples were also collected at depths of 0–10 cm(topsoil)and 10–20 cm(subsoil)to determine the soil physicochemical properties and enzyme *** results showed that the plant coverage and aboveground biomass of *** community were significantly higher than those of ***,***,and *** *** communities(P<0.05).Soil enzyme activities varied among different plant *** the topsoil,the enzyme activities of alkaline phosphatase(ALP)andβ-1,4-glucosidas(βG)were significantly higher in *** and *** *** communities than in other plant communities(P<0.05).The topsoil had higher POC and MAOC contents than the ***,the content of POC in the topsoil was 18.17%–42.73%higher than that in the *** structural equation model(SEM)indicated that plant species diversity,soil pH,and soil water content(SWC)were the main factors influencing POC and *** soil pH inhibited the formation of POC and promoted the formation of ***,SWC stimulated POC production and hindered MAOC *** study aimed to gain insight into the effects of desert plant c

关键词： proluvial fan desert plant community soil enzyme activity particulate organic carbon mineral-associated organic carbon Helan Mountain

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Using Head Patch Pattern as a Reliable Biometric Character for Noninvasive Individual Recognition of an Endangered Pitviper Protobothrops mangshanensis

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Asian Herpetological Research 2013年第2期4卷 134-139页

作者： Daode YANG Sikan CHEN Yuanhui CHEN Yuying YAN Institute of Wildlife Conservation Central South University of Forestry and Technology Hunan Mangshan national nature reserve administration

Mangshan pitviper, Protobothrops mangshanensis （formerly Zhaoermia mangshanensis） is endemic to China. Unfortunately, due to the decreasing size of its wild populations, this snake has been listed as critically endangered. Re- search carried out on the Mangshan pitviper＇s population ecology and captive reproduction has revealed that the unique head patch patterns of different individuals may potentially be used as a noninvasive recognition biometric character. We collected head patch pattern images of 40 individuals of P. mangshanensis between 1994 and 2011. By comparing each pitviper＇s head patch pattern, we found that the head patch pattern of individual snakes was different and unique. Additionally, we observed and recorded the head patch pattern characters of four adults and five juveniles before and af- ter ecdysis. Our findings confirmed that head patch patterns of Mangshan pitvipers are unique and stable, remaining un- changed after ecdysis. Thus, individuals can be quickly identified by examining the head patch pattern within a specific recognition area on the head. This method may be useful for noninvasive individual recognition in many other species that display color patch pattern variations, especially in studies of endangered species where the use of invasive marking techniques is undesirable.

关键词： biometric identification endangered snake head patch pattern Mangshan pitviper noninvasive individualrecognition image analysis natural markings

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Density effect and intraspecific competition in a leaf-mining moth on bamboo leaves

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Journal of Forestry Research 2019年第2期30卷 689-697页

作者： Xiaohua Dai Jiasheng Xu Qingyun Guo Shengchang Lai Peng Liu Juju Fan Peirong Tang Leafminer Group School of Life and Environmental Sciences Gannan Normal University national Navel Orange Engineering Research Center Jiulianshan national nature reserve administration

When confined to a single leaf, the larvae of most leafminers should suffer intense intraspecific competition. The survival and performance of individuals are expected to decline with increasing larval density within a leaf, showing a negative density-dependent effect. The maximum density of an Elachista Treitschke(Lepidoptera:Elachistidae) miner on Indocalamus tessellatus(Munro)Keng f.(Poaceae: Bambusoideae) under natural conditions can be greater than 40 per leaf, making this a good system for studying intraspecific competition and density *** counted the number of leaves with different mine densities in the field and found a clumped distribution of leafminer larvae among host leaves. The emergence rates of pupae(and last-instar larvae), adults and parasitoids were inversely correlated with larval density. Pupal weight and adult weight also showed negative relationships with larval density. However, pairwise tests showed that there might be no differences in pupal or adult weight at larval densities of 1–10 mines per leaf, indicating that densitydependent effects are more obvious at densities greater than 10 mines per leaf. Intraspecific competition could lead to stable density and consistent body size in surviving individual insects, which would help maintain a sustainable population size. The density threshold could be an indicator of the balance between intraspecific competitive detriments and conspecific aggregation benefits; however, the validity of the threshold density hypothesis requires further testing and confirmation.

关键词： Leafminer Density-dependent Distribution pattern Sustainable population Threshold density

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Non-invasive genetic analysis indicates low population connectivity in vulnerable Chinese gorals:concerns for segregated population management

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Zoological Research 2019年第5期40卷 439-448页

作者： Jing Yang Guo-Fen Zhu Jian Jiang Chang-Lin Xiang Fu-Li Gao Wei-Dong Bao College of Biological Sciences and Technology Beijing Forestry University Beijing 100083 China College of Biology and Food Science Hebei Normal University for Nationalities Chengde Hebei 067000 China Beijing Songshan national nature reserve administration Beijing 102115 China Inner Mongolia Saihanwula national nature reserve administration Daban Inner Mongolia 025000 China

Detailed information on the size and genetic structure of wildlife populations is critical for developing effective conservation strategies, especially for those species that have suffered population decline and fragmentation due to anthropogenic activities. In the present study, we used a non-invasive approach combining fecal pellet sampling with mitochondrial DNA and nuclear DNA microsatellite marker analysis to monitor and compare the population structure of the Chinese goral (Naemorhedus griseus) in Beijing and northeast Inner Mongolia in China. Of the 307 fecal samples confirmed to be from N. griseus, 15 individuals (nine females and six males) were found in the Beijing population and 61 individuals (37 females and 24 males) were found in the Inner Mongolian population. Among these 76 individuals, we identified eight haplotypes and 13 nucleotide polymorphic sites from mtDNA and 45 alleles from 10 microsatellite loci. Spatially structured genetic variation and a significant level of genetic differentiation were observed between the two populations. In both populations, the sex ratios were skewed toward females, indicating high reproductive potential, which is crucial for population recovery and conservation of this patchily distributed vulnerable species. We suggest that managing the two populations as evolutionarily significant units with diverse genetic backgrounds could be an effective solution for present population recovery, with the possible relocation of individuals among different groups to help ensure future goral species prosperity.

关键词： Genetic diversity Mitochondrial DNA Microsatellite marker Naemorhedus griseus Non-invasive sampling Sex ratio

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Habitat use and diel activity pattern of the Tibetan Snowcock(Tetraogallus tibetanus):a case study using camera traps for surveying high-elevation bird species

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Avian Research 2019年第1期10卷 21-29页

作者： Gai Luo Chuangming Yang Huaming Zhou Michael Seitz Yongjie Wu Jianghong Ran Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education College of Life ScienceSichuan University The administration of the Gongga Mountain national nature reserve

Background:Global climate change has had significant effects on animal distribution and population dynamics in mid-latitude alpine areas,but we know little about the basic ecology of high-altitude species due to the difficulties of conducting field research in the harsh climate and habitat present at high *** Tibetan Snowcock(Tetraogallus tibetanus) is a little-known phasianid distributing in alpine areas at extremely high elevations in the mountains surrounding the Tibetan *** the species occupancy rate and discussing the factors affecting its distribution based on infrared-triggered camera techniques would provide both a baseline to measure the influence of global warming and valuable information on its conservation and ***:We used infrared-triggered cameras to investigate the Tibetan Snowcock on the western slope of *** from June to November *** used the R package "overlap" to visualize its activity pattern,and used an occupancy model to both examine its habitat use as well as to determine the most influential variables affecting its habitat ***:Using 103 camera traps over 9213 camera-days,we recorded 428 instances of Tibetan *** diel activity peaks of Tibetan Snowcock occurred during the periods of 8:00-10:00 am and 18:00-20:00 *** model estimate of occupancy for Tibetan Snowcock(0.830) was slightly higher than the na?ve site occupancy based on camera detections(0.663),indicating a wider use of habitat than the camera traps ***,slope,settlement density,road density,and EVI(enhanced vegetation index) were the most influential variables for its habitat ***:The Tibetan Snowcock is confirmed to be *** species prefers an environment with a high elevation,gentle slope,and low EVI,apparently facing a trade-off between predator risk,foraging efficiency,and food *** human impact was low,there was a positive correlation between the habitat use of the Tibet

关键词： Activity pattern Habitat preference Mt. Gongga Occupancy model Tibetan Snowcock

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Migration routes of the endangered Oriental Stork(Ciconia boyciana)from Xingkai Lake,China,and their repeatability as revealed by GPS tracking

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Avian Research 2023年第2期14卷 215-222页

作者： Zeyu Yang Lixia Chen Ru Jia Hongying Xu Yihua Wang Xuelei Wei Dongping Liu Huajin Liu Yulin Liu Peiyu Yang Guogang Zhang Key Laboratory of Forest Protection of national Forestry and Grassland administration National Bird Banding Center of ChinaEcology and Nature Conservation InstituteChinese Academy of ForestryBeijing100091China Xingkai Lake national nature reserve of Heilongjiang JixiHeilongjiang158300China

The Oriental Stork(Ciconia boyciana)is listed as'Endangered'on the International Union for the Conservation of nature(IUCN)Red List of Threatened Species and is classified as a first category nationally protected bird species in *** this species'seasonal movements and migration will facilitate effective conservation to promote its *** tagged 27 Oriental Stork nestlings at Xingkai Lake on the Sanjiang Plain in Heilongjiang Province,China,used GPS tracking to follow them over the periods of 2014-2017 and 2019-2022,and confirmed their detailed migratory routes using the spatial analysis function of ArcGIS *** discovered four migration routes during autumn migration:one common long-distance migration route in which the storks migrated along the coastline of Bohai Bay to the middle and lower reaches of the Yangtze River for wintering,one short-distance migration route in which the storks wintered in Bohai Bay and two other migration routes in which the storks crossed the Bohai Strait around the Yellow River and wintered in South *** were no significant differences in the number of migration days,residence days,migration distances,number of stopovers and average number of days spent at stopover sites between the autumn and spring migrations(P>0.05).However,the storks migrated significantly faster in spring than in autumn(P=0.03).The same individuals did not exhibit a high degree of repetition in their migration timing and route selection in either autumn or spring *** storks from the same nest exhibited considerable between-individual variation in their migration *** important stopover sites were identified,especially in the Bohai Rim Region and on the Songnen Plain,and we further explored the current conservation status at these two important ***,our results contribute to the understanding of the annual migration,dispersal and protection status of the endangered Oriental Stork and provide a scientific bas

关键词： Autumn migration GPS tracking Oriental stork Repeatability Spring migration Stopover site

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Spatio-temporal variation of water salinity in mangroves revealed by continuous monitoring and its relationship to floristic diversity

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Plant Diversity 2024年第1期46卷 134-143页

作者： Wei Wang Kun Xin Yujun Chen Yuechao Chen Zhongmao Jiang Nong Sheng Baowen Liao Yanmei Xiong Research Institute of Tropical Forestry Chinese Academy of ForestryGuangzhou 510520PR China Guangdong Zhanjiang Mangrove national nature reserve administration Zhanjiang 524088PR China

Salinity is among the most critical factors limiting the growth and species distribution of coastal *** salinity in estuarine ecosystems varies temporally and spatially,but the variation patterns across different time scales and salinity fluctuation have rarely been *** effects of salinity on floristic diversity in mangroves are not fully understood due to the temporal and spatial heterogeneity of *** this study,we monitored water salinity at an interval of 10-min over one year in three mangrove catchment areas representing the outer part,middle part,and inner part respectively of Dongzhai Bay,Hainan,*** number of mangrove community types and dominant mangrove species of the three catchment areas were also *** found that the diurnal variation and dry-season intra-month variation in water salinity were driven by tidal *** seasonal variation in water salinity was mainly driven by rainfall with higher salinity occurring in the dry season and lower salinity occurring in the wet ***,water salinity was highest at the outer part,intermediate at the middle part,and lowest at the inner part of the *** intra-month and annual fluctuations of water salinity were highest at the middle part and lowest at the outer part of the *** number of mangrove community types and dominant species were lowest at the outer part,intermediate at the middle part,and highest at the inner part of the *** results suggest that the temporal variation of water salinity in mangroves is driven by different factors at different time scales and therefore it is necessary to measure water salinity at different time scales to get a complete picture of the saline environment that mangroves ***,lower salinity levels benefit mangrove species richness within a bay landscape,however,further research is needed to distinguish the effects of salinity fluctuation and salinity level in affecting mangrove species richness.

关键词： Coastal wetlands Mangroves Salinity fluctuation Species diversity Species richness

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Negative effects of artiffcial nest boxes on birds:A review

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Avian Research 2023年第2期14卷 257-266页

作者： Luchang Zhang Xingjian Ma Zhiyu Chen Chunying Wang Zicheng Liu Xiang Li Xiaoying Xing College of Wildlife and Protected Area Northeast Forestry UniversityHarbin150040China Northeast Asia Biodiversity Research Center Harbin150040China Heilongjiang Luobei Dulu River Wetland nature reserve administration Hegang154200China Heilongjiang Taipinggou national nature reserve administration Hegang154200China Dalian Environmental Monitoring Center Dalian116023China

Artificial nest boxes are placed to attract birds to nest and breed in a specific location,and they are widely used in avian ecology research and in the attraction of insectivorous *** is evidence that artificial nest boxes can adversely affect breeding fitness but no great focus has been placed on this issue by ***,we retrieved 321 research papers regarding artificial nest boxes published from 2003 to 2022 and used the'Biblioshiny'program to extract and integrate keywords;we then summarized the adverse effects of artificial nest boxes on avian breeding *** studies highlighted many drawbacks and misuses in the designing and placement of nest boxes;furthermore,bird attraction was decreased by their inappropriate selection,thus reducing breeding *** nest box production,there were shortcomings in the construction material,color,smell,and structural design of the boxes *** boxes were also placed at inappropriate densities,locations,orientations,heights,and managed ***,we propose suggestions for more efficient and safer artificial nest boxes for future use in avian ecology research and bird conservation.

关键词： Artificial nest box Avian breeding Management Negative effect Nest box hanging Nest box location Nest box structure

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The importance of willow to the Chinese Grouse:evidence from analysis on their breeding territories at Lianhuashan,China

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Avian Research 2017年第4期8卷 210-217页

作者： Jin-Ming Zhao Yun Fang Yu-Hai Ma Yue-Hua Sun Key Laboratory of Animal Ecology and Conservation Biology Institute of ZoologyChinese Academy of Sciences School of Resources and Environmental Engineering Anhui University administration Bureau of Lianhuashan national nature reserve

Background: The habitat features of breeding territory have important adaptive significance for the survival and reproduction of territory *** Chinese Grouse(Tetrastes sewerzowi) is a rare and endemic species with rela?tively small distribution range and decreasing population *** is important to elucidate breeding territory habitat requirements of the Chinese Grouse for habitat management and conservation ***: Using radio?telemetry and field observations,we determined the core areas of 65 breeding territories of *** to three samples were selected in each core breeding territory as used sites and compared with nearby sites with no grouse occurrence using logistic ***: Our model showed a high accuracy in prediction of core breeding territory used by males,which preferred stands with more small deciduous trees(0.5 m ≤ height < 5 m),more small willow trees(Salix spp.,0.5 m infl≤ height < 5 m),greater willow cover,and greater herb *** number of small willow trees had the great?estuence on males' core breeding territory *** shrubs were also chosen compared with unused sites Tall conifer trees was an important determinant in the distribution of Chinese Grouse at the landscape scale,and was relatively important in the univariate model,but not included in our final multivariable ***: Male Chinese Grouse established territories at sites with abundant food *** the landscape scale,the Chinese Grouse occurred in alpine conifer *** the territory scale,small willow trees had the most important effect on males' core breeding territory *** suggest that the forest gaps in dense conifer for?est are important for improving the occurrence of willows and facilitating breeding territory establishment for the Chinese Grouse.

关键词： Salix spp Chinese Grouse Territory Core area Conifer forest Logistic regression

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