The responses of riparian plant communities to environmental and spatial factors in the upper Han River basin, China

Fu, Wenlong; Cao, Yu; Li, Xiaoqing; Sun, Junyao; Liu, Fan; Li, Wei

doi:10.1016/j.gecco.2022.e02118

Cited by 5 publications

(4 citation statements)

References 91 publications

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“…Although the upper reaches of the HRB had relatively abundant precipitation, more complex terrain, and strong potential soil erosion, due to the high forest coverage in these areas [42], plant roots can play an obvious consolidation role in the soil [43]. In addition, the vertical structure of vegetation patterns was relatively complete, which can not only reduce soil erosion by precipitation but also regulate runoff, thereby reducing the actual amount of soil erosion, resulting in a large amount of SC in these areas [24,26]. However, the vegetation types in the downstream areas of the watershed were relatively single and there were many cultivated lands, resulting in severe soil erosion [44].…”

Section: Spatiotemporal Dynamics and Driving Factors Of Essmentioning

confidence: 99%

“…However, the HRB's socio-economic development, increasing water use, and water diversion impacts have significantly pressured the watershed's ecosystem, affecting sustainable socio-economic development and the ecological environment [25]. Many scholars have studied the ecological environment changes and hydrological characteristics in the HRB, such as vegetation ecosystem patterns [26] and runoff change [24,27]. However, the spatiotemporal pattern evolution of various ecosystem functional characteristics such as WY, SC, CS, and HQ has not been studied.…”

Section: Introductionmentioning

confidence: 99%

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Driving Factors and Trade-Offs/Synergies Analysis of the Spatiotemporal Changes of Multiple Ecosystem Services in the Han River Basin, China

Han,

Yang,

Wang

et al. 2024

Remote Sensing

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Uncovering the trade-offs and synergy relationship of multiple ecosystem services (ESs) is important for scientific ecosystem management and the improvement of ecological service functions. In this study, we investigated the spatiotemporal changes of four typical ES types (i.e., water yield (WY), carbon storage (CS), soil conservation (SC), and habitat quality (HQ)) from 2001 to 2020 in the Han River Basin (HRB). Meanwhile, the trade-offs and synergies between paired ESs and the socioecological drivers of these ESs were further explored. The results showed that grassland, cropland, and bare land decreased by 12,141.3 km2, 624.09 km2, and 22.1 km2 during the study period, respectively, which can be attributed to their conversion to forests in the HRB. Temporally, the WY, CS, and SC all showed a continuously increasing trend. Spatially, WY and HQ exhibited bipolar clustering characteristics, with WY exhibiting low-value clustering in the upstream and high-value clustering in the downstream, while CS showed the clustering characteristics of a scattered distribution of cold and hot spots from 2001 to 2020. The spatial patterns of aggregation locations in CS and HQ were relatively similar, with clusters of higher ES values mainly distributed in the western and central regions and clusters of lower ES values mainly located in the eastern and southeastern regions, while the aggregation of WY was spatially concentrated. Overall, the CS showed a significant positive correlation with HQ, but a significant negative correlation with WY. Spatially, WY and HQ, CS, and SC showed a substantial trade-off relationship in the northwest and southeast parts of the study area, while HQ, CS, and SC mainly exhibited a synergistic relationship in most parts of the study area. Slope and temperature had high influencing factor coefficients on multiple ESs; the mixed effect of terrain and natural factors was significantly greater than the impact of a single factor on ESs, and terrain factors played an essential role in the changes in ESs. The findings can provide technical and theoretical support for integrated scientific ecosystem management and sustainable development at the local scale.

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Section: Spatiotemporal Dynamics and Driving Factors Of Essmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Driving Factors and Trade-Offs/Synergies Analysis of the Spatiotemporal Changes of Multiple Ecosystem Services in the Han River Basin, China

Han,

Yang,

Wang

et al. 2024

Remote Sensing

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“…Монгол орны нийт нутаг дэвсгэрийн 4.34%-ийг эзлэх (Өлзийхутаг, 1989) боловч ургамалжлын бусад хэвшинжтэй харьцуулахад биологийн ургац, зүйлийн олон янз байдал өндөр, шимт чанар сайтай үетэн, буурцагтан ургамал их ургадаг онцлогтой (Бумжаа, 2002) учраас малын бэлчээрт өргөн ашиглагдаж, хадлан тэжээлийн үндсэн нөөц газар болдог (Манибазар, 1974; Хосбаяр нар, 2015). Татмын нуга нь ууршилт явуулах замаар голын усны температурыг зохицуулах, тунадас, шим тэжээлийн бодисыг шүүх, усны түвшинг тогтвортой барьж (Fu et al, 2022), хур тунадас багасах үед гол мөрнийг тэжээх зэргээр ус намгархаг газрын экосистемийн тэнцвэрт байдлыг хангах маш чухал үүрэгтэй (Манибазар, 2015).…”

Section: удиртгалunclassified

Changes in biomass in the meadow plant community during succession

Enkhriimaa,

Lyankhua,

Tuvshintogtokh

2023

Mong. J. Bot.

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In this research, we determined the changes in species diversity, and biomass in the degraded meadow community during the successional process and also determined the effects of climate, and mowing, there were objects to the restoration of the successional process vegetation community of degraded meadow at the Mungunmorit soum, while fenced 1-hectare area since 2009. Our results showed that four stages of the restoration successional process, which were; stage1: Carex duriuscula-forb-Leymus chinensis community, stage2; Grass-forb community, stage 3; grass community, stage4 was after the mowing process at the primary community and it was changed to Grass-Kobresia community. Therefore, the biomass of green plants increased from stage 1 to the first of stage 3 (147.6 г/м2 -224.1 g/m2), but middle and end of stage 3 biomass were decreasing (68 g/m2), while these processes the biomass of litter were accumulated (102.1 g/m2). After the mowing, at stage 4 the biomass of the green plant was gradually increased (295 g/m2-330 g/m2). The species diversity of the community had been showing the result same as a biomass change. According to the results, the grazing effect for 14 years at the degraded meadow community, there were species richness, species diversity, and green plant biomass increased at the 7-8th years after fencing. On the other hand, for quite a long time fencing was self-affecting negatively on the vegetation community. That’s why proper grazing management and mowing at the right time were effects positively the production of the vegetation community also the annual precipitation was affecting green plant biomass and it increased. Татмын нугын ургамал бүлгэмдлийн биомассын сэргэх сукцесстэй уялдан өөрчлөгдөх нь Хураангуй. Бид Төв аймгийн Мөнгөнморьт суманд доройтсон татмын нугын ургамал бүлгэмдлийн 1 га талбайг 2009 оноос эхлэн 14 жил хашиж хамгаалан байгалийн аясаар нөхөн сэргэх үйл явцыг судалж, сэргэх сукцессийн үед ургамал бүлгэмдлийн биомассын өөрчлөлт болоод түүнд зүйлийн олон янз байдал, тухайн жилүүдийн цаг агаарын хүчин зүйлс болон хадлан хадалтын хэрхэн нөлөөлж буйг илрүүлэхийг зорилоо. Судалгааны үр дүнгээр тус бүлгэмдэлд 4 шаттай сэргэх сукцесс явагдсан. Үүнд: 1-р шатанд Нангиад түнгэ-алаг өвс-ширэг улалжит бүлгэмдэл, 2-р шатанд Алаг өвс-үетэнт бүлгэмдэл, 3-р шатанд Үетэнт бүлгэмдэл, 4-р шатанд Бушилз-үетэнт бүлгэмдэл байгаа ба энэ шат нь бүлгэмдлийг хадсаны дараах үетэй давхцаж байна. Ногоон ургамлын биомасс сукцессийн 1-р шатнаас 3-р шатны эхэн хүртэл нэмэгдэж (147.6 г/м2 -224.1 г/м2) байснаа 3-р шатны дунд, төгсгөл орчимд багасаж (68 г/м2), хагдны хуримтлал нэмэгдсэн (102.1 г/м2). Харин ургамал бүлгэмдлийг хадсаны дараагаар буюу сукцессийн 4-р шатанд ногоон ургамлын биомасс эргэн нэмэгдсэн (295 г/м2-330 г/м2). Бүлгэмдлийн зүйлийн олон янз байдал нь ногоон ургамлын биомасстай ижил зүй тогтолтой байсан бөгөөд цөөн наст ургамлууд (r2=0.607) болон алаг өвсний (r2=0.778) биомасс нь зүйлийн олон янз байдалтай шууд хамааралтай байна. Түүнчлэн өндөр ургадаг үетэн, улалжийн биомасс нэмэгдэхэд намхан ургадаг эдгээр ургамлууд бүлгэмдлээс түрэгдэж буй нь олон янз байдлыг буурахад хүргэж байна. Үүнээс үзэхэд доройтсон татмын нугын ургамал бүлгэмдлийг мал бэлчээрлэлтээс чөлөөлөхөд бүлгэмдлийн зүйлийн баялаг, олон янз байдал болон биомасс нэмэгдэж бүлгэмдэл 7-8 жилд сэргэж байна. Гэвч хэт удаан хугацаанд хашиж хамгаалахад хагдны хуримтлалыг нэмэгдүүлж байна. Иймд ургамал бүлгэмдлийн бүтээмжийн тогтвортой байдалд зохистой хэмжээний мал бэлчээрлэлт болон тодорхой давтамжтай хадлан хадалт нь эерэг нөлөөлдөг байна. Түүнчлэн цаг агаарын цаг агаарын хүчин зүйлс тэр дундаа хур тунадас нь ургамал бүлгэмдлийн биомассыг нэмэгдүүлж буйг бидний судалгаа харуулж байна. Түлхүүр үгс: Биомасс, татмын нуга, сукцесс

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“…After realizing the existence and impact of these threats, humanity has conducted extensive research to restore rivers [7,8]. The research results show that the community diversity of river microorganisms, plants, and animals can be effectively enhanced by regulating the environmental flow of the river [9][10][11][12]. Maintaining the environmental flow of the river will help to continuously improve the water-environment quality of the river and help to restore the health of the river and the surrounding ecosystems [13,14].…”

Section: Introductionmentioning

confidence: 99%

Determining Critical Thresholds of Environmental Flow Restoration Based on Planktonic Index of Biotic Integrity (P−IBI): A Case Study in the Typical Tributaries of Poyang Lake

Wang

Huang

Zhu

et al. 2022

IJERPH

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Hydropower construction and climate change have aggravated river hydrological changes, which have reduced the water flow regime in the Ruhe River Basin. The reduced flow of the river seriously affected the water supply of nearby residents and the operation of the river ecosystem. Therefore, in order to alleviate the contradiction between water use for hydropower facilities and environmental water use, the urgent need is to explore the ecological flow-threshold of rivers. This study took the Fuhe River Basin as the research object, and summarized the monitoring data of eight hydrological stations from recent decades. Based on this, we explored the response law of P−IBI and flow, a tool to quickly measure the health of the ecosystem. Through the response relationship between alterations in environmental factors of the river and phytoplankton index of biotic integrity (P−IBI), it was determined that environmental flow was the dominant influencing factor of P−IBI. According to P−IBI, the threshold of environmental discharge in the Fuhe River was limited to 273~826.8 m3/s. This study established a regulatory framework for the river flow of large rivers by constructing P−IBI and determining the critical thresholds of environmental flow by constraining the constitution. These results provide a theoretical basis for better planning and improvement of river ecosystem restoration and river utilization.

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The responses of riparian plant communities to environmental and spatial factors in the upper Han River basin, China

Cited by 5 publications

References 91 publications

Driving Factors and Trade-Offs/Synergies Analysis of the Spatiotemporal Changes of Multiple Ecosystem Services in the Han River Basin, China

Driving Factors and Trade-Offs/Synergies Analysis of the Spatiotemporal Changes of Multiple Ecosystem Services in the Han River Basin, China

Changes in biomass in the meadow plant community during succession

Determining Critical Thresholds of Environmental Flow Restoration Based on Planktonic Index of Biotic Integrity (P−IBI): A Case Study in the Typical Tributaries of Poyang Lake

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