生态学报最新文献

{"title":"Distribution of heavy metals Hg, Pb, and Cr in the coastal waters of small islands of Ternate, Indonesia","authors":"None Najamuddin, None Inayah, Rusmawati Labenua, Muhammad Farid Samawi, Khusnul Yaqin, Rustam Effendi Paembonan, Firdaut Ismail, Zulhan Arifin Harahap","doi":"10.1016/j.chnaes.2023.09.002","DOIUrl":"https://doi.org/10.1016/j.chnaes.2023.09.002","url":null,"abstract":"The purpose of this study was to analyse the distribution of heavy metal concentrations of Hg, Pb, and Cr in the coastal waters of Ternate Island. There are 10 sampling points, each 4 sampling points around fishing boat docks, 2 sampling points around settlements, and 4 sampling points around Pertamina's Port. Heavy metal analysis of Hg, Pb, and Cr was carried out on seawater and sediment samples using atomic absorption spectrophotometry (AAS). The measurement of the physical-chemical parameters of the waters obtained that the average of each parameter was temperature 30.39 °C, salinity 30.33 ‰, pH 7.88, dissolved oxygen (DO) 11.54 mg/l, total dissolved solids (TDS) 35.02 mg/l, and organic carbon dissolved 62.65 mg/l. The physical-chemical parameters of the waters at this research site were still good for the survival of marine organisms. Sediment texture indicated that the dominant sediment texture at the research site was sand. The average concentrations of heavy metals Hg, Pb, and Cr in the seawater were 0.00085 mg/l, 0.01 mg/l, and 0.045 mg/l, respectively. Concentrations of heavy metals Hg in the seawater was in accordance with quality standards, while heavy metals Pb and Cr have exceeded water quality standards (Government Regulation Number 21 of 2022). The average concentrations of heavy metals Hg, Pb, and Cr in the sediment were 0.390 mg/kg, 15.66 mg/kg, and 14.02 mg/kg, respectively. Based on the Canadian Council of Ministers for the Environment (CCME, 2001), concentrations of heavy metals Pb and Cr in sediments were below the threshold for the marine biota protection while Hg has exceeded the threshold. Each heavy metal has unique characteristics and a distinctive distribution pattern controlled by physical-chemical processes that occur in the marine systems so that studies of heavy metals from each region globally are always required.","PeriodicalId":7048,"journal":{"name":"生态学报","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135248794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing onion growth and yield through agroecological practices: Organic fertilization and intercropping","authors":"Yasmine Elouattassi, Mohamed Ferioun, Naïma El Ghachtouli, Khalid Derraz, Fouad Rachidi","doi":"10.1016/j.chnaes.2023.09.004","DOIUrl":"https://doi.org/10.1016/j.chnaes.2023.09.004","url":null,"abstract":"The harmonious integration of two agroecological methods, namely intercropping and organic fertilization, illustrates a sustainable approach that not only boosts crop productivity but also minimizes the environmental impact, demonstrating a commitment to both higher yields and responsible environmental stewardship. This research aims to explore the effects of organic fertilization on onions intercropped with pepper, fennel, and carrots within an agroecological context. The study was conducted over two seasons using a randomized complete block design with 12 treatments. Notably, organic fertilization yielded results similar to mineral fertilization (NPK). Among intercropping combinations, onion-carrot displayed the highest yield and growth characteristics. Onion-pepper intercropping didn't significantly impact onion growth, while onion-fennel intercropping negatively affected agronomic parameters. Carrot intercropping led to increased plant height, with inorganic fertilization demonstrating stronger effects than organic fertilization. NPK fertilizer notably enhanced stem diameter, particularly in onion-carrot intercropping. Intercropping, especially with NPK, positively influenced the number of leaves per plant. NPK fertilizer excelled in enhancing plant fresh weight, with onion-pepper and onion-carrot intercropping enhancing second-season yields. NPK fertilizer also stood out in plant dry weight, and onion-carrot intercropping excelled in bulb weight. Yield was significantly impacted by intercropping and fertilization, with NPK significantly enhancing yield and onion-carrot intercropping demonstrating promising results. Principal component analysis revealed that onion-carrot intercropping with organic fertilizer nearly matched chemical NPK yield levels. The study provides valuable insights into optimizing onion cultivation and recommends adopting onion-carrot intercropping in the Fes-Meknes region. Overall, this research advances understanding of the intricate interplay between organic fertilization and intercropping, offering strategies for improved yield and sustainability in agroecological systems.","PeriodicalId":7048,"journal":{"name":"生态学报","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135484439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Climate change impacts on high altitude wildlife distribution: Predicting range shifts for four ungulates in Changthang, eastern Ladakh","authors":"Anchal Bhasin, Sunetro Ghosal, Pankaj Raina, Upamanyu Hore","doi":"10.1016/j.chnaes.2023.09.005","DOIUrl":"https://doi.org/10.1016/j.chnaes.2023.09.005","url":null,"abstract":"Climate change has a significant impact on species habitat and its distribution. Understanding and predicting range shifts and changing habitat use patterns in the context of climate change is important for management and conservation. Changthang region in eastern Ladakh is the western extension of the Tibetan plateau and is home to many ungulates. In this study, we used ensemble modelling using an ensemble modelling approach to estimate the current and future distribution of four ungulates namely Bluesheep, Tibetan gazelle, Tibetan argali and Kiang in Changthang region. We used the global circulation model (GCM) from WorldClim produced by Community Climatic System Model Version 4 to predict possible future changes with 24 environmental and topographic variables for two time periods (2050 and 2070). The results suggest that these ungulates may lose 57% to 61% of their current range, depending on the algorithm used and dispersal scenarios with a northward shift in their ranges. The maximum predicted range loss is for the Tibetan gazelle with an average of 90% loss, which might make it locally endangered with a prediction that only 9.5% of their present habitat might be suitable for them in 2070 in the context of climate change. An estimated 100 individuals of Tibetan gazelles are known to be in Ladakh with a patchy distribution in the southern part of the study area. The Tibetan gazelle in Ladakh requires urgent conservation efforts to enable it to adapt to future climate change scenarios in the region. We recommend restoration and conservation of grassland ecosystems that were historically and currently occupied by ungulates with additional attention given to potential suitable habitats outside protected areas by regulation of human activities.","PeriodicalId":7048,"journal":{"name":"生态学报","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134995095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficacy of processing methods on the proximate composition and microbial loads in Senilia senilis (Linnaeus, 1758) in mangrove swamps of Iko estuary, southeast, Nigeria","authors":"Imefon Udo, Dora Udoh, Imekan Isaac Akpan","doi":"10.1016/j.chnaes.2023.08.006","DOIUrl":"https://doi.org/10.1016/j.chnaes.2023.08.006","url":null,"abstract":"","PeriodicalId":7048,"journal":{"name":"生态学报","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75480023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Appraisal of river sediments in southwestern Nigeria with a special focus on trace metals: Occurrence, seasonal variation, sources, and health risks","authors":"I. Ololade, A. Apata, N. A. Oladoja, B. A. Alabi, O. O. Ololade","doi":"10.1016/j.chnaes.2023.08.004","DOIUrl":"https://doi.org/10.1016/j.chnaes.2023.08.004","url":null,"abstract":"","PeriodicalId":7048,"journal":{"name":"生态学报","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86230293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrating Sentinel 2A data for selecting the best methods in observation of biological pigments in coastal water","authors":"Muhammad A. El-Alfy, Ahmed M. Alzeny, Wael S. El-Tohamy, Imtiyaz Qayoom, Hazem T. Abd El-Hamid","doi":"10.1016/j.chnaes.2023.09.003","DOIUrl":"https://doi.org/10.1016/j.chnaes.2023.09.003","url":null,"abstract":"Coastal waters serve as critical ecosystems, supporting diverse marine life and offering invaluable resources to human communities. Understanding the distribution and dynamics of biological pigments, such as chlorophyll and phytoplankton, is essential for assessing the health and productivity of these ecosystems. Remote sensing technology has revolutionized our ability to monitor these pigments, providing a synoptic view of coastal waters. Sentinel-2A, a European Space Agency satellite, offers high-resolution multispectral data, making it a valuable resource for coastal studies. This paper presents a comprehensive analysis of Sentinel-2A data integration techniques for the observation of biological pigments in coastal waters along the coasts of Mediterranean Sea (Abu-Qir Area) from seven different sampling sites for the presence of different chlorophyll forms. Water samples were collected and physico-chemical characteristics like dissolved oxygen, pH, conductivity and chlorophyll were measured. In chlorophyll estimation, different forms of were calculated viz. chl a, b, c and carotenoids using different methodologies. Images from the Sentinel Multispectral Imager (MSI) sensor were taken on the same sample date. The phyto-planktonic forms, carotenoids, and their ratios in the sampling sites were also determined analytically. With the integration of satellite images (Sentinel 2A), results indicated types of chlorophyll, carotenoids, and ratios' distributions in the Abu-Qir Area of the Mediterranean Sea, Egypt. Our results demonstrate that the kind of species, illumination levels, and nutrient concentrations may all affect how much chlorophyll is absorbed by phytoplankton. Additionally, the band ratios of the different pigment types were found to be connected, such as b3/b8, or the same band might interact with other bands like b5, b4, b6, and b7, or b8a. Additionally, it was noticed that the green band and near infrared bands were useful for detecting pigments integrated with sampling datasets.","PeriodicalId":7048,"journal":{"name":"生态学报","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135347901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Factors affecting the tree and soil carbon stock in Shorea robusta Gaertn. forests along the elevational gradient in Eastern Nepal","authors":"Sujan Chaudhary, Biva Aryal","doi":"10.1016/j.chnaes.2023.09.001","DOIUrl":"https://doi.org/10.1016/j.chnaes.2023.09.001","url":null,"abstract":"","PeriodicalId":7048,"journal":{"name":"生态学报","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135249027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rhizosphere bacteriome of Allium cepa after the application of chemical and endophyte-based fertilizer","authors":"Rumella Simarmata, T. Widowati, Sylvia Jrl, Rahayu Fwp, Margaretta Christita, Yeni Khairina, Eva Erdayani, F. H. Khumairah","doi":"10.1016/j.chnaes.2023.08.009","DOIUrl":"https://doi.org/10.1016/j.chnaes.2023.08.009","url":null,"abstract":"","PeriodicalId":7048,"journal":{"name":"生态学报","volume":"464 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82521352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Habitat heterogeneity and topographic variation as the drivers of insect pest distributions in alpine landscapes","authors":"Chun-Jing Wang ,&nbsp;Shao-Jun Wang ,&nbsp;Chun-Mei Yu ,&nbsp;Xiao-Ting Wang ,&nbsp;Rong Wang ,&nbsp;Ji-Zhong Wan","doi":"10.1016/j.chnaes.2022.08.005","DOIUrl":"https://doi.org/10.1016/j.chnaes.2022.08.005","url":null,"abstract":"<div><p>Insect pests<span> pose a large threat to alpine landscapes, especially under global environmental change<span> conditions. It is necessary to explore the effects of environmental factors on the distribution of pests and provide implications for pest management in alpine landscapes. The main objective of this study was to explore whether habitat heterogeneity and topographic variation could drive insect pest distributions in alpine landscapes. We used species distribution modelling to project the distributions of 58 insect pest species in alpine landscapes based on occurrence records from 5513 field sites and different sets of environmental variables (i.e., climate, climate + habitat heterogeneity, climate + topographic variation, and climate + habitat heterogeneity + topographic variation). Then, we applied the jackknife method to determine the contribution of environmental variables to insect pest distributions. We found that habitat heterogeneity and topographic variation could significantly affect the distribution probability for all insect pest species in Qinghai, China. The response curves of the probability of pest distribution to habitat heterogeneity and topographic variation vary depending on the species present in alpine landscapes. There were four types of response curves of habitat heterogeneity and topographic variation to insect pest distribution probability, namely, 1) increasing, 2) decreasing, 3) increasing and then decreasing, and 4) decreasing and then increasing. Habitat heterogeneity and topographic variation should be integrated into modelling the distributions of insect pest species in alpine landscapes for pest risk assessment.</span></span></p></div>","PeriodicalId":7048,"journal":{"name":"生态学报","volume":"43 4","pages":"Pages 596-603"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49728117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Temporal changes in tree community structure and carbon stocks in a human-impacted tropical dry evergreen forest, South India","authors":"Ashaq Ahmad Dar ,&nbsp;Kanda Naveen Babu ,&nbsp;K. Dilshad ,&nbsp;Snigdha Nath ,&nbsp;Narayanaswamy Parthasarathy","doi":"10.1016/j.chnaes.2022.09.002","DOIUrl":"https://doi.org/10.1016/j.chnaes.2022.09.002","url":null,"abstract":"<div><p><span>Long-term studies in forest ecosystems are crucial to interpret the dynamics and are essential for conservation and management. However, characterizing long-term dynamics in relation to disturbance across dry tropics is often constrained by a dearth of data particularly from Indian tropics. In this context, a one-hectare permanent plot established in 2001 was revisited in 2011 and further re-censused in 2020 to ascertain species composition, stand structure and carbon stock dynamics of tree community over a 19-year period (2001−2020). Although species richness remained more or less unaffected, tree species composition did vary with the addition and loss of five and 10 species over this period. Species-level mortality rates overshadow the annual recruitment rate resulting in a net decrease in structural components. The results revealed that tree density decreased profoundly to 583 individuals ha</span>⁻¹<span> in 2020, roughly 46% of the initial inventory. Similarly, basal area is reduced by 40% (from 58.27 m</span>² ha⁻¹ to 34.91 m² ha⁻¹), highlighting the impact of increased site disturbance over 19 years. The distribution of individuals and basal area to various diameter classes displayed a reverse <em>J-</em>shaped trend in both the inventories suggesting that all the size classes suffered equally over the years. The total carbon stock was as high as 416.01 Mg ha⁻¹ in the initial inventory and reduced to 250.70 Mg ha⁻¹ in the present re-census. Relative carbon stock calculations revealed that <span><em>Ficus benghalensis</em></span> (−46.05 Mg ha⁻¹), <span><em>Drypetes</em><em> sepiaria</em></span> (−22.68 Mg ha⁻¹) and <span><em>Pterospermum</em><em> canescens</em></span> (−14.98 Mg ha⁻¹) represented 64.84% of total carbon stock loss over the period. Among the 29 resourceful species, <em>Memecylon umbellatum</em>, <em>Drypetes sepiaria</em> and <span><em>Glycosmis</em><span><em> </em><em>mauritiana</em></span></span> represented the highly targeted species with varied dietary and medicinal importance. These findings attest the impact of anthropogenic disturbances on species composition and carbon stock potential of the present site, which underline the need for such long-term monitoring efforts useful to forest management and conservation.</p></div>","PeriodicalId":7048,"journal":{"name":"生态学报","volume":"43 4","pages":"Pages 701-711"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49713075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}