Guoxu Ji, Hasbagan Ganjurjav, Guozheng Hu, Zhi-qiang Wan, Peidong Yu, Mingjie Li, Rui Gu, C. Xiao, Qimuge Hashen, Qingzhu Gao
As an important clean energy source, the scale and quantity of wind power have steadily increased under the background of global change. The construction and operation of wind power facilities have massive impacts on grassland microclimates. However, the effect of wind power operation on the plant community composition is still unclear. To investigate this issue, we selected wind farms in 6 meadow grasslands and 6 typical steppes in the central region of Inner Mongolia, the province with the largest scale of grassland wind power operations in China. At these sites, we conducted field sample surveys to obtain species information, measure plant biomass, calculate plant diversity, and take soil samples to determine soil nutrients. The results showed that wind power operation significantly reduced the dominance of Poaceae and Cyperaceae plants in both types of grasslands and significantly increased the Shannon diversity of meadow grasslands. The inconsistent responses at each experimental site led to a nonsignificant overall effect of wind power operation on the plant beta diversity. In addition, wind power operation significantly increased plant biomass in meadow grasslands. Wind power operation did not change the soil total carbon, total nitrogen, ammonium nitrogen, or nitrate nitrogen. On the basis of the results, we suggest strengthening the long-term monitoring of temperate grassland plant community composition in wind farms, and replanting of community-building species could be done at appropriate times.
{"title":"Wind Power Increases the Plant Diversity of Temperate Grasslands but Decreases the Dominance of Palatable Plants","authors":"Guoxu Ji, Hasbagan Ganjurjav, Guozheng Hu, Zhi-qiang Wan, Peidong Yu, Mingjie Li, Rui Gu, C. Xiao, Qimuge Hashen, Qingzhu Gao","doi":"10.34133/ehs.0014","DOIUrl":"https://doi.org/10.34133/ehs.0014","url":null,"abstract":"\u0000 As an important clean energy source, the scale and quantity of wind power have steadily increased under the background of global change. The construction and operation of wind power facilities have massive impacts on grassland microclimates. However, the effect of wind power operation on the plant community composition is still unclear. To investigate this issue, we selected wind farms in 6 meadow grasslands and 6 typical steppes in the central region of Inner Mongolia, the province with the largest scale of grassland wind power operations in China. At these sites, we conducted field sample surveys to obtain species information, measure plant biomass, calculate plant diversity, and take soil samples to determine soil nutrients. The results showed that wind power operation significantly reduced the dominance of\u0000 Poaceae\u0000 and\u0000 Cyperaceae\u0000 plants in both types of grasslands and significantly increased the Shannon diversity of meadow grasslands. The inconsistent responses at each experimental site led to a nonsignificant overall effect of wind power operation on the plant beta diversity. In addition, wind power operation significantly increased plant biomass in meadow grasslands. Wind power operation did not change the soil total carbon, total nitrogen, ammonium nitrogen, or nitrate nitrogen. On the basis of the results, we suggest strengthening the long-term monitoring of temperate grassland plant community composition in wind farms, and replanting of community-building species could be done at appropriate times.\u0000","PeriodicalId":54216,"journal":{"name":"Ecosystem Health and Sustainability","volume":" ","pages":""},"PeriodicalIF":4.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45260965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Terrestrial ecosystems are a critical carbon dioxide (CO 2 ) sink for achieving carbon (C) neutrality before 2060 in China. Here, we used the Coupled Model Intercomparison Project phase 6 (CMIP6) model outputs to quantify the spatiotemporal patterns of net ecosystem productivity (NEP) and its major environmental controls, as well as the dominant C pools for NEP during 1900–2100. We found that (a) according to CMIP6 NEP spatiotemporal characteristics, terrestrial ecosystems in China sequestered 0.310 ± 0.058 Pg C·year –1 during 1980–2014 and will act as a strong C sink [from 0.515 ± 0.075 Pg C·year –1 under Shared Socioeconomic Pathway 126 (SSP126) to 0.631 ± 0.089 Pg C·year –1 under SSP585] in the future (2015–2100). Pronounced turning points were found for the temporal trends of NEP during the historical (1984) and under 4 future emissions scenarios (2057 for SSP126, 2053 for SSP245, 2038 for SSP370, and 2044 for SSP585). (b) The positive effect of temperature on NEP appears to weaken after each turning point of future scenarios. (c) The enlarged vegetation C pool size dominates the growing terrestrial ecosystem C storage. The CMIP6 projection shows that the total C storage in Chinese terrestrial ecosystems increases continuously and peaks in the 2040s to 2050s under each scenario. Future afforestation in the northeast, southeast, and southwestern regions, as well as soil C pool management in the northwest and middle north regions, will greatly contribute to achieving C neutrality in China, particularly under low emission scenario (SSP126).
{"title":"Terrestrial net ecosystem productivity in China during 1900–2100","authors":"Jianzhao Liu, Fenghui Yuan, Ning Chen, Nannan Wang, Yunjiang Zuo, Kexin Li, Ziyu Guo, Xinhao Zhu, Ying Sun, Lihua Zhang, Yuedong Guo, Xiaofeng Xu, Changchun Song","doi":"10.34133/ehs.0139","DOIUrl":"https://doi.org/10.34133/ehs.0139","url":null,"abstract":"Terrestrial ecosystems are a critical carbon dioxide (CO 2 ) sink for achieving carbon (C) neutrality before 2060 in China. Here, we used the Coupled Model Intercomparison Project phase 6 (CMIP6) model outputs to quantify the spatiotemporal patterns of net ecosystem productivity (NEP) and its major environmental controls, as well as the dominant C pools for NEP during 1900–2100. We found that (a) according to CMIP6 NEP spatiotemporal characteristics, terrestrial ecosystems in China sequestered 0.310 ± 0.058 Pg C·year –1 during 1980–2014 and will act as a strong C sink [from 0.515 ± 0.075 Pg C·year –1 under Shared Socioeconomic Pathway 126 (SSP126) to 0.631 ± 0.089 Pg C·year –1 under SSP585] in the future (2015–2100). Pronounced turning points were found for the temporal trends of NEP during the historical (1984) and under 4 future emissions scenarios (2057 for SSP126, 2053 for SSP245, 2038 for SSP370, and 2044 for SSP585). (b) The positive effect of temperature on NEP appears to weaken after each turning point of future scenarios. (c) The enlarged vegetation C pool size dominates the growing terrestrial ecosystem C storage. The CMIP6 projection shows that the total C storage in Chinese terrestrial ecosystems increases continuously and peaks in the 2040s to 2050s under each scenario. Future afforestation in the northeast, southeast, and southwestern regions, as well as soil C pool management in the northwest and middle north regions, will greatly contribute to achieving C neutrality in China, particularly under low emission scenario (SSP126).","PeriodicalId":54216,"journal":{"name":"Ecosystem Health and Sustainability","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135845954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A scientific and systematic approach that provides accurate carbon accounting is a fundamental prerequisite for responding to the climate crisis. The carbon accounting system has evolved from production-based accounting measuring territorial emissions to consumption-based accounting, gradually covering spatial and temporal separation. Its scientificity is thus enhanced. The temporal separation (between past production and current consumption) from fixed capital has become of recent interest, but a panoramic overview still rarely exists because of longstanding neglect. Combining quantitative analysis with a literature review, this study systematically analyzed the historical development and current state of carbon accounting, especially on studies endogenizing fixed capital, to locate hotspots and predict future trends. The current studies with fixed capital endogenization mainly use a flow matrix and augmented method to analyze the total and structure and the difference with traditional results, which are still in the initial rise stage; however, the process analysis and influence factor identification are insufficient. Therefore, this study proposes future avenues for analyzing the entire process of spatial and temporal carbon transfer based on a metabolic perspective and considering the initial input factors to identify the key drivers, which will provide new ideas and perspectives for policy formulation.
{"title":"From Geospatial to Temporal Separation: A Review on Carbon Accounting Endogenizing Fixed Capital","authors":"Dongxiao Xu, Yan Zhang, Zhifeng Yang","doi":"10.34133/ehs.0002","DOIUrl":"https://doi.org/10.34133/ehs.0002","url":null,"abstract":"A scientific and systematic approach that provides accurate carbon accounting is a fundamental prerequisite for responding to the climate crisis. The carbon accounting system has evolved from production-based accounting measuring territorial emissions to consumption-based accounting, gradually covering spatial and temporal separation. Its scientificity is thus enhanced. The temporal separation (between past production and current consumption) from fixed capital has become of recent interest, but a panoramic overview still rarely exists because of longstanding neglect. Combining quantitative analysis with a literature review, this study systematically analyzed the historical development and current state of carbon accounting, especially on studies endogenizing fixed capital, to locate hotspots and predict future trends. The current studies with fixed capital endogenization mainly use a flow matrix and augmented method to analyze the total and structure and the difference with traditional results, which are still in the initial rise stage; however, the process analysis and influence factor identification are insufficient. Therefore, this study proposes future avenues for analyzing the entire process of spatial and temporal carbon transfer based on a metabolic perspective and considering the initial input factors to identify the key drivers, which will provide new ideas and perspectives for policy formulation.","PeriodicalId":54216,"journal":{"name":"Ecosystem Health and Sustainability","volume":" ","pages":""},"PeriodicalIF":4.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44668078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bo Pang, T. Xie, B. Cui, Qing Wang, Z. Ning, Zezheng Liu, Cong Chen, Yuming Lu, Xiaohu Zhao
An accelerating rate of sea level rise (SLR) is causing huge inundation pressure on coastal wetlands worldwide. Vegetation of coastal wetlands plays a key role in stabilizing the coast and accreting sediment in order to mitigate the negative impact of SLR. The ability to accrete sediment is influenced by individual species traits; however, there are insufficient information and indicators to identify differences in the adaptability of various coastal vegetations to SLR at a regional or global scale. Here, the potential adaptation of 27 plant populations in coastal wetlands subject to SLR was evaluated using a compiled global dataset and a marsh equilibrium model. Sediment accretion efficiency differed among plant populations, but most coastal marsh populations and a few mangrove populations had relatively high accretion rates; habitats with high accretion rates will have a better potential to deal with the threat of SLR. These results showed that latitude and efficiency shared a nonlinear relationship, and plant stem density and root structure were among the important factors that influenced the efficiency. Fibrous root plant populations had a greater sediment accretion efficiency than tap root plant populations, and perennial populations had a greater sediment accretion efficiency than annual plant populations. These findings can provide key parameters relating to the sediment accretion efficiency of hydrological and geomorphic models on a global scale. This study offers some novel insights into the dynamic changes in coastal wetlands following SLR that will be particularly useful in devising appropriate strategies for the protection and management of coastal wetlands.
{"title":"Adaptability of Common Coastal Wetland Plant Populations to Future Sea Level Rise","authors":"Bo Pang, T. Xie, B. Cui, Qing Wang, Z. Ning, Zezheng Liu, Cong Chen, Yuming Lu, Xiaohu Zhao","doi":"10.34133/ehs.0005","DOIUrl":"https://doi.org/10.34133/ehs.0005","url":null,"abstract":"An accelerating rate of sea level rise (SLR) is causing huge inundation pressure on coastal wetlands worldwide. Vegetation of coastal wetlands plays a key role in stabilizing the coast and accreting sediment in order to mitigate the negative impact of SLR. The ability to accrete sediment is influenced by individual species traits; however, there are insufficient information and indicators to identify differences in the adaptability of various coastal vegetations to SLR at a regional or global scale. Here, the potential adaptation of 27 plant populations in coastal wetlands subject to SLR was evaluated using a compiled global dataset and a marsh equilibrium model. Sediment accretion efficiency differed among plant populations, but most coastal marsh populations and a few mangrove populations had relatively high accretion rates; habitats with high accretion rates will have a better potential to deal with the threat of SLR. These results showed that latitude and efficiency shared a nonlinear relationship, and plant stem density and root structure were among the important factors that influenced the efficiency. Fibrous root plant populations had a greater sediment accretion efficiency than tap root plant populations, and perennial populations had a greater sediment accretion efficiency than annual plant populations. These findings can provide key parameters relating to the sediment accretion efficiency of hydrological and geomorphic models on a global scale. This study offers some novel insights into the dynamic changes in coastal wetlands following SLR that will be particularly useful in devising appropriate strategies for the protection and management of coastal wetlands.","PeriodicalId":54216,"journal":{"name":"Ecosystem Health and Sustainability","volume":" ","pages":""},"PeriodicalIF":4.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47792863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yali Liu, Yao Ning, Jianqing Du, Yu Chen, Liwen Shan, Yaqian Yang, B. Ji, Yanfen Wang
The “Green Belt and Road Initiative” (GBRI) is China’s international cooperation strategy aimed at expanding international collaborations between China, Asia, and Europe through regional trade, policy dialogue, and cultural exchange in order to promote the achievement of sustainable development goals (SDGs). Identifying the development characteristics and deficiencies of Belt and Road countries is critical to investment and policymaking decisions. Here, we incorporated progress evenness across SDGs based on biodiversity measurements to establish a comprehensive assessment system and evaluated the sustainable development status and trajectory of Belt and Road countries from 2017 to 2021. Our results suggest that, although most countries have experienced progress toward SDGs, disregarding evenness among goals tended to result in the overestimation of the current achievements and ignore regional gaps. Economically developed member countries in the Organization for Economic Co-operation and Development (OECD) were more successful in achieving SDGs, but they also faced development bottlenecks owing to uneven development among the 17 goals, with particular shortcomings in goals related to climate actions. However, many countries with relatively poor economies, mostly in Central and Southeast Asia, performed well on eco-environment-related SDGs. Therefore, complementary collaboration among countries may provide a green development pathway to rapidly promote the achievement of SDGs in the Belt and Road region, which emphasizes the urgency and potential for the GBRI. In essence, while uneven development is a tremendous challenge for Belt and Road countries, it presents an opportunity to enhance regional cooperation in support of the GBRI.
{"title":"Uneven Progress Toward Sustainable Development Goals Reveals Urgency and Potential for Green Belt and Road Initiative","authors":"Yali Liu, Yao Ning, Jianqing Du, Yu Chen, Liwen Shan, Yaqian Yang, B. Ji, Yanfen Wang","doi":"10.34133/ehs.0092","DOIUrl":"https://doi.org/10.34133/ehs.0092","url":null,"abstract":"The “Green Belt and Road Initiative” (GBRI) is China’s international cooperation strategy aimed at expanding international collaborations between China, Asia, and Europe through regional trade, policy dialogue, and cultural exchange in order to promote the achievement of sustainable development goals (SDGs). Identifying the development characteristics and deficiencies of Belt and Road countries is critical to investment and policymaking decisions. Here, we incorporated progress evenness across SDGs based on biodiversity measurements to establish a comprehensive assessment system and evaluated the sustainable development status and trajectory of Belt and Road countries from 2017 to 2021. Our results suggest that, although most countries have experienced progress toward SDGs, disregarding evenness among goals tended to result in the overestimation of the current achievements and ignore regional gaps. Economically developed member countries in the Organization for Economic Co-operation and Development (OECD) were more successful in achieving SDGs, but they also faced development bottlenecks owing to uneven development among the 17 goals, with particular shortcomings in goals related to climate actions. However, many countries with relatively poor economies, mostly in Central and Southeast Asia, performed well on eco-environment-related SDGs. Therefore, complementary collaboration among countries may provide a green development pathway to rapidly promote the achievement of SDGs in the Belt and Road region, which emphasizes the urgency and potential for the GBRI. In essence, while uneven development is a tremendous challenge for Belt and Road countries, it presents an opportunity to enhance regional cooperation in support of the GBRI.","PeriodicalId":54216,"journal":{"name":"Ecosystem Health and Sustainability","volume":" ","pages":""},"PeriodicalIF":4.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47452695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Qian He, Yue Wang, Q. Qiu, Yan Su, Hongxu Wei, Ji-yue Li
Degraded forests still retain a high dose of nature that may evoke positive sentiments of visitors. This function reminds policy makers to reevaluate the development of degraded forests by using their nonmaterial services. Forest visitors have a general habit of taking facial photos and share with internet friends. This results in the formation of a dataset that comprises scores of posted sentiments toward visitors’ experiences in degraded forests. People post facial photos with emotions exposed to a subjective extent that can be impacted by perceived experiences with joint landscape and microclimate, but their combined effects have not been well demonstrated on a large geographical scale. In this study, a total of 30 degraded forests were selected from suburban areas of 22 cities in Southeast China. There were 2,751 facial photos of forest visitors that were collected and screened from a database of social network platform of China, namely, Sina Weibo. Happy and sad expressional scores were rated by the FireFACE software, and their spatiotemporal distributions were mapped. Both horizontal and vertical planes of objective forest landscapes were remotely evaluated by projected area and vegetation height, respectively. Microclimatic conditions were characterized by meteorological records on the same days when photos were posted. Exposed happiness was distributed as a geographical gradient from lower scores in the northeast region of study area to higher scores in the southwest. Wind velocity (WV), tree height, and elevation generated positive contributions to regressed happy score. However, combined low WV and high sunshine duration hour benefitted the regression of higher sad scores. Our results revealed that people would like to pose more smiles in degraded forests with unhindered wind flows under tall and dense canopies located on highlands. Furthermore, policy makers could consider developing degraded forests as a type of infrastructure that can trigger the promotion of users’ mental well-being, instead of focusing only on negative consequences following ecological degradation.
{"title":"Posted Sentiments toward Experiences in Degraded Forests Are Shaped Jointly by Landscape Structure and Microclimate","authors":"Qian He, Yue Wang, Q. Qiu, Yan Su, Hongxu Wei, Ji-yue Li","doi":"10.34133/ehs.0004","DOIUrl":"https://doi.org/10.34133/ehs.0004","url":null,"abstract":"Degraded forests still retain a high dose of nature that may evoke positive sentiments of visitors. This function reminds policy makers to reevaluate the development of degraded forests by using their nonmaterial services. Forest visitors have a general habit of taking facial photos and share with internet friends. This results in the formation of a dataset that comprises scores of posted sentiments toward visitors’ experiences in degraded forests. People post facial photos with emotions exposed to a subjective extent that can be impacted by perceived experiences with joint landscape and microclimate, but their combined effects have not been well demonstrated on a large geographical scale. In this study, a total of 30 degraded forests were selected from suburban areas of 22 cities in Southeast China. There were 2,751 facial photos of forest visitors that were collected and screened from a database of social network platform of China, namely, Sina Weibo. Happy and sad expressional scores were rated by the FireFACE software, and their spatiotemporal distributions were mapped. Both horizontal and vertical planes of objective forest landscapes were remotely evaluated by projected area and vegetation height, respectively. Microclimatic conditions were characterized by meteorological records on the same days when photos were posted. Exposed happiness was distributed as a geographical gradient from lower scores in the northeast region of study area to higher scores in the southwest. Wind velocity (WV), tree height, and elevation generated positive contributions to regressed happy score. However, combined low WV and high sunshine duration hour benefitted the regression of higher sad scores. Our results revealed that people would like to pose more smiles in degraded forests with unhindered wind flows under tall and dense canopies located on highlands. Furthermore, policy makers could consider developing degraded forests as a type of infrastructure that can trigger the promotion of users’ mental well-being, instead of focusing only on negative consequences following ecological degradation.","PeriodicalId":54216,"journal":{"name":"Ecosystem Health and Sustainability","volume":" ","pages":""},"PeriodicalIF":4.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42231088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mohammed Al-Hetari, Husnain Haider, A. Ghumman, I. Al-Salamah, H. Thabit, M. Shafiquzzaman
In dry rivers, urban wastewater discharge forms a pond in the dry period, and surface runoff shapes a longer pond in the wet period. A water quality management model developed for dry rivers is applied on Wadi Rumah in Saudi Arabia. The sub-basin was delineated from 30-m × 30-m spatial resolution digital elevation model. Hydrologic loss, runoff rates, and time of concentration were determined using the soil conservation service curve number, soil conservation service unit hydrograph methods, and Kirpich formula. Hydrologic Engineering Center Hydrologic Modeling System estimated the wet weather flows for 10 low-to-medium rainfall events. A steady-state hydrodynamic model including river flows, effluent discharge, and evaporation and infiltration losses estimated the hydraulic retention time for the explicit case of ponding conditions of dry rivers. Mass balance and first-order kinetics modeled the physical (total dissolved solid and total suspended solid), chemical (biochemical oxygen demand, dissolved oxygen, chemical oxygen demand, NH 3 , PO 4 , and Cl 2 ), and microbiological (total coliform and fecal coliform) parameters. The hydrodynamic model and biokinetic rate coefficients were calibrated with satellite images, reported literature, and field measurements. A water quality index compared the aggregated water quality against the standards for 4 intended uses. The study yields “very good” water quality for restricted and unrestricted irrigation for the dry period, “fair” for livestock drinking, and “marginal” for fishery and recreation for the dry period, while water quality remained “marginal” for all the uses in the wet period. Water quality management implies regular water quality monitoring, continuous improvement of treatment facilities, and flood plain management initiatives for the long-term sustainability of dry rivers in arid regions.
{"title":"Development of a Water Quality Management Model for Dry Rivers in Arid Regions: Application on Wadi Rumah, Saudi Arabia","authors":"Mohammed Al-Hetari, Husnain Haider, A. Ghumman, I. Al-Salamah, H. Thabit, M. Shafiquzzaman","doi":"10.34133/ehs.0001","DOIUrl":"https://doi.org/10.34133/ehs.0001","url":null,"abstract":"\u0000 In dry rivers, urban wastewater discharge forms a pond in the dry period, and surface runoff shapes a longer pond in the wet period. A water quality management model developed for dry rivers is applied on Wadi Rumah in Saudi Arabia. The sub-basin was delineated from 30-m × 30-m spatial resolution digital elevation model. Hydrologic loss, runoff rates, and time of concentration were determined using the soil conservation service curve number, soil conservation service unit hydrograph methods, and Kirpich formula. Hydrologic Engineering Center Hydrologic Modeling System estimated the wet weather flows for 10 low-to-medium rainfall events. A steady-state hydrodynamic model including river flows, effluent discharge, and evaporation and infiltration losses estimated the hydraulic retention time for the explicit case of ponding conditions of dry rivers. Mass balance and first-order kinetics modeled the physical (total dissolved solid and total suspended solid), chemical (biochemical oxygen demand, dissolved oxygen, chemical oxygen demand, NH\u0000 3\u0000 , PO\u0000 4\u0000 , and Cl\u0000 2\u0000 ), and microbiological (total coliform and fecal coliform) parameters. The hydrodynamic model and biokinetic rate coefficients were calibrated with satellite images, reported literature, and field measurements. A water quality index compared the aggregated water quality against the standards for 4 intended uses. The study yields “very good” water quality for restricted and unrestricted irrigation for the dry period, “fair” for livestock drinking, and “marginal” for fishery and recreation for the dry period, while water quality remained “marginal” for all the uses in the wet period. Water quality management implies regular water quality monitoring, continuous improvement of treatment facilities, and flood plain management initiatives for the long-term sustainability of dry rivers in arid regions.\u0000","PeriodicalId":54216,"journal":{"name":"Ecosystem Health and Sustainability","volume":" ","pages":""},"PeriodicalIF":4.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46814153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The Humboldt squid Dosidicus gigas is a pelagic cephalopod species extensively distributed in the Eastern Pacific Ocean. Geographically separated habitat patterns of D. gigas show large spatiotemporal variations due to the distinct different regional environmental conditions. This study explored geographical variation in seasonal habitat of D. gigas off Peru and the Eastern Pacific Equator using maximum entropy (Maxent) model, with fishing occurrence data and environmental variables including sea surface temperature (SST), sea surface salinity, net primary production (NPP), photosynthetically active radiation (PAR), chlorophyll a concentration, eddy kinetic energy, and sea level anomaly. Results indicated that all the environmental variables exhibited conspicuous seasonal and geographical differences off Peru and the Eastern Pacific Equator. On the basis of the percent contribution from the Maxent model, seasonal and spatial extents of habitat were largely explained by SST, NPP, PAR, and eddy kinetic energy in the Eastern Pacific Equator and SST, sea surface salinity, NPP, and PAR off Peru. Suitable ranges of each environmental variable differed between regions and were controlled by the seasonal variability. Furthermore, movement patterns of longitudinal and latitudinal gravity centers of fishing effort of D. gigas were consistent with spatial and temporal distribution of suitable habitats but showed dramatically geographical variations off Peru and the Eastern Pacific Equator. Our findings highlighted Maxent mode’s ability in exploring Humboldt squid habitat hotspots in the Eastern Pacific Ocean and suggested that constructing the habitat model for D. gigas should consider the geographical differences under environmental conditions.
{"title":"Geographical Distribution Variations of Humboldt Squid Habitat in the Eastern Pacific Ocean","authors":"Xingnan Fang, Yang Zhang, Wei Yu, Xinjun Chen","doi":"10.34133/ehs.0010","DOIUrl":"https://doi.org/10.34133/ehs.0010","url":null,"abstract":"\u0000 The Humboldt squid\u0000 Dosidicus gigas\u0000 is a pelagic cephalopod species extensively distributed in the Eastern Pacific Ocean. Geographically separated habitat patterns of\u0000 D. gigas\u0000 show large spatiotemporal variations due to the distinct different regional environmental conditions. This study explored geographical variation in seasonal habitat of\u0000 D. gigas\u0000 off Peru and the Eastern Pacific Equator using maximum entropy (Maxent) model, with fishing occurrence data and environmental variables including sea surface temperature (SST), sea surface salinity, net primary production (NPP), photosynthetically active radiation (PAR), chlorophyll\u0000 a\u0000 concentration, eddy kinetic energy, and sea level anomaly. Results indicated that all the environmental variables exhibited conspicuous seasonal and geographical differences off Peru and the Eastern Pacific Equator. On the basis of the percent contribution from the Maxent model, seasonal and spatial extents of habitat were largely explained by SST, NPP, PAR, and eddy kinetic energy in the Eastern Pacific Equator and SST, sea surface salinity, NPP, and PAR off Peru. Suitable ranges of each environmental variable differed between regions and were controlled by the seasonal variability. Furthermore, movement patterns of longitudinal and latitudinal gravity centers of fishing effort of\u0000 D. gigas\u0000 were consistent with spatial and temporal distribution of suitable habitats but showed dramatically geographical variations off Peru and the Eastern Pacific Equator. Our findings highlighted Maxent mode’s ability in exploring Humboldt squid habitat hotspots in the Eastern Pacific Ocean and suggested that constructing the habitat model for\u0000 D. gigas\u0000 should consider the geographical differences under environmental conditions.\u0000","PeriodicalId":54216,"journal":{"name":"Ecosystem Health and Sustainability","volume":" ","pages":""},"PeriodicalIF":4.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47919036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Despite tidal action, which is influenced by sea level rise, having a substantial impact on plant communities, salt marsh plant communities in coastal wetlands also act as a coastal zone barrier. Phragmites australis and Spartina alterniflora were selected for the experiment in the Yellow River Delta wetland. The mechanical characteristics of the plants in the Yellow River Delta were investigated by field sampling, and the mechanical experimental data were used to simulate plant stresses under natural conditions using the ANSYS model based on finite element theory. The results are as follows: Assuming that the 2 plants have the same stem diameter, the deformation of S. alterniflora is greater than that of P. australis under both static tension and pressure conditions, confirming the phenomenon that the P. australis material has stronger strength resistance properties. When this model was applied to the force analysis in the natural state, it was discovered that the material strength attribute of P. australis is higher than that of S. alterniflora . From the perspective of morphology and structure, the stout stem of S. alterniflora can greatly alleviate the stress of itself under external force and greatly reduce the invasion effect of external force because field conditions are limited and do not reflect immediate mechanical feedback. The model simulation provides a way to accurately and efficiently obtain the mechanical action of plant body when discussing the mechanical action similar to wave action on plant stem and to explain some ecological phenomena from the perspective of mechanics.
{"title":"Finite Element-Based Simulation Analysis of Wetland Plant Mechanics","authors":"Yanqi Wang, Guoxin Yan, Jiakai Liu, Zhenming Zhang","doi":"10.34133/ehs.0007","DOIUrl":"https://doi.org/10.34133/ehs.0007","url":null,"abstract":"\u0000 Despite tidal action, which is influenced by sea level rise, having a substantial impact on plant communities, salt marsh plant communities in coastal wetlands also act as a coastal zone barrier.\u0000 Phragmites australis\u0000 and\u0000 Spartina alterniflora\u0000 were selected for the experiment in the Yellow River Delta wetland. The mechanical characteristics of the plants in the Yellow River Delta were investigated by field sampling, and the mechanical experimental data were used to simulate plant stresses under natural conditions using the ANSYS model based on finite element theory. The results are as follows: Assuming that the 2 plants have the same stem diameter, the deformation of\u0000 S. alterniflora\u0000 is greater than that of\u0000 P. australis\u0000 under both static tension and pressure conditions, confirming the phenomenon that the\u0000 P. australis\u0000 material has stronger strength resistance properties. When this model was applied to the force analysis in the natural state, it was discovered that the material strength attribute of\u0000 P. australis\u0000 is higher than that of\u0000 S. alterniflora\u0000 . From the perspective of morphology and structure, the stout stem of\u0000 S. alterniflora\u0000 can greatly alleviate the stress of itself under external force and greatly reduce the invasion effect of external force because field conditions are limited and do not reflect immediate mechanical feedback. The model simulation provides a way to accurately and efficiently obtain the mechanical action of plant body when discussing the mechanical action similar to wave action on plant stem and to explain some ecological phenomena from the perspective of mechanics.\u0000","PeriodicalId":54216,"journal":{"name":"Ecosystem Health and Sustainability","volume":" ","pages":""},"PeriodicalIF":4.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45913181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Human activities through changes in land and water use have led to increase in provision ecosystem services (ESs) but decrease in some regulating, supporting, and cultural services in the past thousands of years. The impact of land and water use on different types of ESs has been extensively studied, but it has not been directly linked to its societal drivers, thus failed to explain the societal root cause of ES degradation. This paper aims to examine the impacts of 3 generic societal drivers: societal value, institutional governance, and science and technology development on the evolution of ESs in the Heihe River Basin, China since 2000 years ago. Water provision, food provision, groundwater maintenance, climate regulation, and environmental flow maintenance were examined as the major ESs. Content analysis method was used to track the change of the 3 societal drivers from various textual documents. It was found that there were strong trade-off relationships between food provision and groundwater maintenance in midstream and the environmental flow maintenance services in downstream. The slow-changing and independently developed societal drivers failed to adaptively respond to the increasing food provision demands while addressing the significant decrease in groundwater and environmental flows. It is concluded that rational water (re)allocation and use are the prerequisites of balanced development of different categories of ESs and linking societal development to the benefits humans obtain from ecosystems is the prerequisite for sustainable ES management.
{"title":"Impacts of Societal Development on the Evolution of Ecosystem Services in the Heihe River Basin, China","authors":"Shuanglei Wu, Yongping Wei, Yukun Li, Zhixiang Lu","doi":"10.34133/ehs.0008","DOIUrl":"https://doi.org/10.34133/ehs.0008","url":null,"abstract":"Human activities through changes in land and water use have led to increase in provision ecosystem services (ESs) but decrease in some regulating, supporting, and cultural services in the past thousands of years. The impact of land and water use on different types of ESs has been extensively studied, but it has not been directly linked to its societal drivers, thus failed to explain the societal root cause of ES degradation. This paper aims to examine the impacts of 3 generic societal drivers: societal value, institutional governance, and science and technology development on the evolution of ESs in the Heihe River Basin, China since 2000 years ago. Water provision, food provision, groundwater maintenance, climate regulation, and environmental flow maintenance were examined as the major ESs. Content analysis method was used to track the change of the 3 societal drivers from various textual documents. It was found that there were strong trade-off relationships between food provision and groundwater maintenance in midstream and the environmental flow maintenance services in downstream. The slow-changing and independently developed societal drivers failed to adaptively respond to the increasing food provision demands while addressing the significant decrease in groundwater and environmental flows. It is concluded that rational water (re)allocation and use are the prerequisites of balanced development of different categories of ESs and linking societal development to the benefits humans obtain from ecosystems is the prerequisite for sustainable ES management.","PeriodicalId":54216,"journal":{"name":"Ecosystem Health and Sustainability","volume":" ","pages":""},"PeriodicalIF":4.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41957494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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