Global Ecology and Conservation最新文献

{"title":"Conservation agriculture compared to conventional tillage improves the trade-off between ground-dwelling arthropod trophic groups for natural pest regulation in cotton cropping systems","authors":"Anicet Gbèblonoudo Dassou ,&nbsp;Pierrot Lionel Yemadje ,&nbsp;Mintodê Nicodème Atchadé ,&nbsp;Lionel Cédric Gohouédé ,&nbsp;Charlemagne Dègbédji Aboua ,&nbsp;Stéphane Boulakia ,&nbsp;Oumarou Balarabe ,&nbsp;Emmanuel Sekloka ,&nbsp;Pablo Tittonell","doi":"10.1016/j.gecco.2024.e03223","DOIUrl":"10.1016/j.gecco.2024.e03223","url":null,"abstract":"<div><div>Conservation agriculture is an innovative approach based on minimal soil disturbance, soil cover with crop residues, and crop rotation, which increases the biodiversity of soil macrofauna thus contributing to nutrient cycling and soil aggregation. In addition, macrofaunal abundance may play a role at regulating insect pest populations. The study aims to predict the effects of soil management practices (conventional tillage and conservation agriculture) on the abundance of soil macrofauna and herbivore predation in cotton (<em>Gossypium hirsutum</em> L.) based cropping systems. We conducted a field experiment with a randomized complete block comprising two treatments, Conventional Tillage (CT) and Conservation Agriculture (CA), and six replications in a cotton-maize rotation system from 2020 to 2023. Soil monoliths and pitfall traps were installed in both treatments to collect ground-dwelling arthropods, to analyse the influence of soil management practices on their abundance, their trophic groups, and the rate of pest predation by generalist predators. Pest predation rates were assessed using artificial caterpillars made from plasticine. The results showed significant positive effects of soil management practices on herbivory rate, herbivore abundance, predator abundance, omnivore-predator abundance and pest predation rate. The average herbivory rate was 9.8 % in the conservation agriculture plots and 11.6 % in the conventional tillage plots. Overall, the predation rate was 58.9 % in the conservation agriculture plots and 21.8 % in the conventional tillage plots. The abundance of predators and of omnivore-predators were significantly higher in conservation agriculture than in conventional tillage. These findings suggest that conservation agriculture practices improve soil macrofauna and pest regulation, with potential benefits on soil quality and sustainability in cotton cropping systems.</div></div>","PeriodicalId":54264,"journal":{"name":"Global Ecology and Conservation","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142356671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Insect conservation in agricultural landscapes needs both high crop heterogeneity and semi-natural habitats","authors":"Sara Tassoni ,&nbsp;David Becker ,&nbsp;Marit Kinga Kasten ,&nbsp;Jérôme Morinière ,&nbsp;Ingo Grass","doi":"10.1016/j.gecco.2024.e03218","DOIUrl":"10.1016/j.gecco.2024.e03218","url":null,"abstract":"<div><div>Identifying landscapes that are suitable for both biodiversity conservation and agricultural production is a major challenge. Traditionally, much research has focused on biodiversity conservation outside of agricultural production areas, e.g., in semi-natural habitats. In contrast, recent research has mainly focused on the potential of crop heterogeneity. This includes both compositional (crop diversity) and configurational heterogeneity (field border density). However, if and how crop heterogeneity, and semi-natural habitats interact to shape insect diversity in agricultural landscapes remains poorly understood. Here we investigated the combined effects of crop diversity, field border density, and semi-natural habitats (i.e., grassland proportion, hedge density) on insect diversity. We sampled insect communities from 14 – 17 June 2021 with pan traps in 27 study landscapes (500 m x 500 m) covering independent gradients of these landscape variables and identified a total of 587 insect species with DNA metabarcoding. We found that field border density mediated the effects of crop diversity, grassland proportion, and hedge density on insect richness. At low levels of field border density (i.e., landscapes with mostly large fields), effects were either neutral (crop diversity), negative (grassland proportion) or weakly positive (hedge density). By contrast, at high levels of field border density, crop diversity, grassland proportion, and hedge density all exerted positive effects on insect richness. Responses to crop heterogeneity and semi-natural habitat differed among trophic groups of insects (decomposers, herbivores, parasitoids, predators). While variation in richness of herbivorous insects followed the patterns of the overall richness, decomposer richness was not related to any of the investigated variables. Predator richness increased with hedge density in landscapes, whereas parasitoid richness increased when high levels of field border density and grassland proportion coincided. Our study shows that increasing crop heterogeneity is a viable strategy for promoting insect diversity in agricultural landscapes. However, the effects of the amount of remaining semi-natural habitats, such as grassland or hedges, are mediated by configurational heterogeneity, and vary between trophic groups. Efforts to conserve insects in agricultural landscapes must therefore focus on both increasing the heterogeneity of the crop matrix by promoting crop diversity and increasing the density of field borders, while also maintaining or restoring semi-natural habitats as important source habitats for insect species.</div></div>","PeriodicalId":54264,"journal":{"name":"Global Ecology and Conservation","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Applying the driver-pressure-state-impact-response model to ecological restoration: A case study of comprehensive zoning and benefit assessment in Zhejiang Province, China","authors":"Song Yao ,&nbsp;Yonghua Li ,&nbsp;Xiangyang Quan ,&nbsp;Jiren Xu","doi":"10.1016/j.gecco.2024.e03222","DOIUrl":"10.1016/j.gecco.2024.e03222","url":null,"abstract":"<div><div>Ecosystem degradation is a global problem that poses a significant threat to the sustainable development of human societies, particularly in developing countries, such as China. In response, China has implemented a series of ecological restoration (ER) policies over recent years. However, significant regional developmental disparities, pronounced spatial heterogeneity of ecological issues, and substantial historical debt for ER in China present considerable obstacles and financial burdens to the effective implementation of ER strategies. Delineating ER zones and assessing the ER benefits are essential for developing effective ER strategies and implementing ER projects. In this study, we constructed a comprehensive framework for ER utilizing the Driver-Pressure-State-Impact-Response (DPSIR) model, quantified the urbanization levels, ecological state, and restoration costs in Zhejiang Province to delineate ER zones, integrated the patch-generating land use simulation model with the ecosystem service value assessment method to quantify the benefits of ER, and ultimately developed tailored ER strategies. The results showed that: (1) The pattern of urbanization levels was characterized by high levels in the northeast and low levels in the southwest, which constrated with the ecological state. The areas of high restoration costs were located in the northeastern and southeastern regions, and the areas of low restoration costs were situated in the southwestern region. (2) The rate of construction land expansion is significantly curtailed under the ER scenario compared to the natural development scenario in 2035, while forest areas have seen effective protection and an increase from the levels of 2020. (3) The ER policy is projected to generate ecological benefits totaling CNY 8.23 billion by 2035, substantially reducing the rate of ecosystem degradation. (4) Zhejiang Province is divided into five zones at the county scale: ecological autonomous protection zone, ecological core protection zone, ecological priority restoration zone, ecological control zone, and moderate development zone. Strategies have been devised based on the forecasted benefits of ER, offering valuable insights into ecological management. These findings aim to enhance the understanding of ER and support the development and implementation of regional ecological policies.</div></div>","PeriodicalId":54264,"journal":{"name":"Global Ecology and Conservation","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142356767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Factors influencing risk of predation by subsidized predators on juvenile Mojave desert tortoises (Gopherus agassizii)","authors":"Collin J. Richter ,&nbsp;Brian D. Todd ,&nbsp;Kurt A. Buhlmann ,&nbsp;Gabriella R. Barnas ,&nbsp;Michel T. Kohl ,&nbsp;Tracey D. Tuberville","doi":"10.1016/j.gecco.2024.e03220","DOIUrl":"10.1016/j.gecco.2024.e03220","url":null,"abstract":"<div><div>A persistent lack of juvenile recruitment in populations of the imperiled Mojave desert tortoise (<em>Gopherus agassizii</em>) has been attributed to artificially inflated populations of coyotes (<em>Canis latrans</em>) and common ravens (<em>Corvus corax</em>) in some areas. Subsidized by resources in the form of road-killed prey, movement corridors, or nesting perches provided by ever-expanding road and powerline networks, these “subsidized predators” threaten tortoises and other species thanks to subsidies that help support their populations in areas where they might otherwise have been less abundant. Here, we quantified the risk of predation from these subsidized predators on juvenile Mojave desert tortoises by quantifying attack rates on 3D-printed replicas. We evaluated predation risk as a function of replica size, distance from powerlines, and season—variables that can inform release strategies of head-started and translocated tortoises. We found significantly greater risk of predation from ravens in the spring than in the fall. Replica size did not significantly influence predation risk from ravens or coyotes. Replica distance from a powerline or road also did not significantly influence predation risk, supporting previous studies that have found the risk of predation can persist for up to 1.6 km from raven nesting structures. Our results support recommendations for releasing juvenile head-started and translocated tortoises in the fall and away from areas close to raven nesting structures. Our study provides insight into the interactions of prey and subsidized predators and helps guide management on potential mitigation strategies for minimizing the impacts of subsidized predators on species like the imperiled Mojave desert tortoise.</div></div>","PeriodicalId":54264,"journal":{"name":"Global Ecology and Conservation","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modern Abies, Picea, and Tsuga pollen distribution along the elevation gradient in East Asia","authors":"Anning Cui ,&nbsp;Baoshuo Fan ,&nbsp;Deke Xu ,&nbsp;Hao Li ,&nbsp;Houyuan Lu","doi":"10.1016/j.gecco.2024.e03224","DOIUrl":"10.1016/j.gecco.2024.e03224","url":null,"abstract":"<div><div>Sub-alpine dark coniferous forests (SCFs) exhibit distinct latitudinal and longitudinal elevation distributions in East Asia. The SCF genera <em>Abies</em>, <em>Picea</em>, and <em>Tsuga</em> produce distinctive pollen and have specific elevation and climate requirements, allowing for the reconstruction of paleo-climatic and paleo-elevational changes from fossil pollen sequences. However, the relationship between SCF elevational distribution and the percentage of coniferous pollen has not been elucidated at the continental scale. In this study, we determined the relationship between <em>Abies</em>, <em>Picea</em>, and <em>Tsuga</em> pollen percentages and SCF elevation distributions in East Asia using an integrated pollen dataset comprising 4863 modern samples. The total percentage of these pollen types showed bimodal patterns with elevation and unimodal patterns with climate. Maximum pollen percentages occurred at elevations of 0–1000 and 2000–4600 m, mean annual temperatures of −5–10 ℃, and mean annual precipitation values of 100–1500 mm. The elevation with the highest proportion of <em>Abies</em> + <em>Picea</em> + <em>Tsuga</em> pollen increased with decreasing latitude: from 500 m (&gt;43°N) to 2300 m (37–43°N), to 3500 m (30–37°N), and to 4000 m (18–30°N). Elevation also exhibited non-monotonic variations with longitude, first increasing from 2500 m (&lt;93°E) to 3500 m (93–102°E), and then decreased to 2500 m (102–113°E) and 500 m (&gt;113°E). The spatial patterns of <em>Abies</em>, <em>Picea</em>, and <em>Tsuga</em> pollen abundance were closely correlated with modern SCF distributions, which are largely modulated by climate and elevation. This study lays the foundation for reconstructing paleo-climate and paleo-elevation variations across East Asia.</div></div>","PeriodicalId":54264,"journal":{"name":"Global Ecology and Conservation","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142356769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A box quadrat for standardised sampling of Orthoptera in open habitats: Design, handling, applications and baseline data","authors":"Thomas Fartmann ,&nbsp;Felix Maximilian Freienstein ,&nbsp;Felix Helbing ,&nbsp;Gwydion Scherer ,&nbsp;Dominik Poniatowski","doi":"10.1016/j.gecco.2024.e03217","DOIUrl":"10.1016/j.gecco.2024.e03217","url":null,"abstract":"<div><div>Globally, insects are declining at an alarming rate. Therefore, there is an urgent need for standardised monitoring methods to detect changes in insect populations at an early stage. Box quadrat sampling enables highly precise assessments of Orthoptera community composition within a specific area. However, a detailed design of a box quadrat that guarantees an easy workflow, precise descriptions of its handling and a compilation of baseline data for future comparisons have yet been lacking. Based on thirty years of our own experience in box quadrat sampling, we present here: (i) the detailed design of a box quadrat, (ii) its standardised handling in the field (including a video as a supplement), (iii) its applications and (iv) Orthoptera species richness and abundance baseline data for open habitats. The low construction costs (∼300 €) and simple design allow for a wide distribution of this type of box quadrat in future. Moreover, due to the plug system and the light aluminium construction, the quadrat can easily be transported, assembled, handled and dismantled by one person. For comparisons of Orthoptera species richness, abundance and community composition between habitats, we recommend using a quadrat of 2 m² size and 0.8 m height and a minimum sampling area of 20 m² per plot (10 touchdowns per plot). For long-term monitoring or when species are sampled that generally occur in low density, a sampling area of 30 m² (15 replicates) is suggested. By contrast, for the surveys of tiny species (e.g., groundhoppers) and developmental stages (nymphs), smaller box quadrats can also be used and the sampled area per plot can be below 20 m². Box quadrat sampling is less dependent on favourable weather conditions and vegetation structure than many other insect survey techniques. Overall, it allows rapid and highly precise assessments of Orthoptera community composition.</div></div>","PeriodicalId":54264,"journal":{"name":"Global Ecology and Conservation","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transboundary Ecological Network Communities based on natural protected areas: A case study of the Mekong River Basin, Asia","authors":"Shipeng Xu ,&nbsp;Yanjie Zhang","doi":"10.1016/j.gecco.2024.e03216","DOIUrl":"10.1016/j.gecco.2024.e03216","url":null,"abstract":"<div><div>Natural protected areas (NPAs) around the world play a crucial role in preserving Earth's biodiversity. Ecological networks can be used to identify the close connections between NPAs. The Mekong River, one of the most crucial international rivers in Southeast Asia, boasts a temperate climate and abundant water resources, serving as a hotspot for global biodiversity and a densely populated area with a complex macro-ecosystem. This study, based on the characteristics of cross-border ecosystems in the Mekong River Basin, introduces the concept of “Ecological Network Communities” (ENCs) and demonstrates its foundational construction methodology: firstly, the Minimum Cumulative Resistance (MCR) model is employed to construct ecological networks based on NPAs, followed by applying Clauset-Newman-Moore (CNM) algorithm for community detection within the river basin. The results of the study indicate the presence of deep structures within the ecological networks of the Mekong River Basin and ENCs are observed to exhibit variations over time. The study delves into the complexities of transboundary ecological networks, offering an effective methodology for community detection and uncovering the \"Community Merging Effect” observed during the research. It emphasizes the need for constructing ecological networks and community-based management of protected areas, providing new directions for cross-national environmental cooperation and ecosystem management oriented towards complexity.</div></div>","PeriodicalId":54264,"journal":{"name":"Global Ecology and Conservation","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Do establishment of protected areas and implementation of regional policies both promote the forest NPP? Evidence from Wuyi Mountain in China based on PSM-DID","authors":"Miaojun Ye ,&nbsp;Lingyun Liao ,&nbsp;Tianqi Fu ,&nbsp;Siren Lan","doi":"10.1016/j.gecco.2024.e03210","DOIUrl":"10.1016/j.gecco.2024.e03210","url":null,"abstract":"<div><div>Establishing protected areas has been a longstanding strategy to conserve forests. Net Primary Productivity (NPP) offers a reflection of ecosystem quality and vegetation vitality compared to traditional spatial indicators, making it a valuable metric for evaluating conservation outcomes in protected areas. Additionally, there is a lack of knowledge about the concurrent influence of in situ conservation and pertinent policies on forest conservation. Through Propensity Score Matching (PSM) and the Difference-in-Difference (DID) model, we evaluated the conservation outcomes of NPP within protected areas and identified different policies’ impacts. Wuyi Mountain in China, known for its rich forest resources, was selected as the study area. The results revealed: (1) NPP within all protected areas fluctuated within a stable range from 1985 to 2021, with some exhibiting a significant upward trend; (2) A total of 62.5 % of protected areas demonstrated a positive effect on forest NPP. There is a 72 % effective conservation rate for nature reserves, one type of protected area in China, making them the most effectively protected in Wuyi Mountain; (3) In 50 % of the cases, the policies resulted in positive outcomes. The impact of policies on forest NPP varies across different types of protected areas; (4) Only 16.67 % of policy scenarios demonstrated a concurrent positive effect from both protected areas and conservation policies. By analyzing the impact of protected area establishment and conservation policy implementation on NPP, our research can offer valuable insights for policymakers aiming to enhance forest conservation in mountain areas.</div></div>","PeriodicalId":54264,"journal":{"name":"Global Ecology and Conservation","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sub-habitat classification of temperate salt marshes in Japan based on aquatic fauna","authors":"Akihiko Koyama ,&nbsp;Takahiro Imai,&nbsp;Kota Matsushima,&nbsp;Satoshi Shimooka","doi":"10.1016/j.gecco.2024.e03211","DOIUrl":"10.1016/j.gecco.2024.e03211","url":null,"abstract":"<div><div>Salt marshes are being lost worldwide even though they provide essential ecosystem services. Habitat classification of salt marshes based on fauna, which is an effective indicator of their ecosystems, is expected to be useful to effectively assess the baseline for conservation and restoration; however, it has not been well studied. This study aimed to identify the diversity of salt marsh sub-habitats for fauna, where biota was collected and the physicochemical environments were measured in 101 small patches of salt marsh (i.e., survey sites) across 32 temperate tidal rivers and inlets in Fukuoka Prefecture, Kyushu, Japan. A total of 78 aquatic animal species (decapod crustaceans, gastropod mollusks, bivalves, nereidid polychaetes, and fish) were observed, 63 of which were used as indicators for sub-habitat identification. Although reed plants covered 90 of the 101 survey sites, the survey sites were classified into six clusters based on fauna. Representative aquatic animals were identified in each cluster, and these six clusters had different physicochemical environments, such as salinity and sediment conditions. The results indicated that the six sub-habitats had different biotic and abiotic characteristics. On the other hand, the results of the ordination analysis indicated that the fauna of the six sub-habitats do not occur independently of each other but are composed of continuous and gradually changing fauna along environmental gradients. Although no significant differences in the areas of salt marsh patches among the clusters, species richness differed significantly, suggesting that physicochemical environments, such as salinity and sediment conditions, rather than spatial factors, may affect species diversity. The findings emphasize that each sub-habitat supports species diversity in temperate salt marshes and are expected to contribute to planning targets for future salt marsh conservation/restoration and further improvements in artificial marshes.</div></div>","PeriodicalId":54264,"journal":{"name":"Global Ecology and Conservation","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of health status and environmental factors on the trade-off between aboveground growths of endangered Abies koreana in Mt. Jirisan, South Korea","authors":"Jong Bin Jung ,&nbsp;Go Eun Park","doi":"10.1016/j.gecco.2024.e03215","DOIUrl":"10.1016/j.gecco.2024.e03215","url":null,"abstract":"<div><div>Understanding resource allocation trade-offs is essential for efficient forest management, particularly for species prone to decline amidst challenging environmental conditions. However, the allocation of resources to aboveground organs under varying health statuses and environmental conditions remains unclear. Therefore, we examined the trade-off relationship between the growth of aboveground organs and influence of environmental factors, particularly in high-altitude regions vulnerable to climate change. Growth of aboveground organs and trade-off between healthy and declining Korean fir trees in subalpine forests was examined. Korean fir demonstrated distinct temporal shifts in the trade-off among aboveground organs based on health status. Healthy trees exhibited the highest relative benefit in needle length. In contrast, declining trees showed the most significant relative benefit in branch length. In post-drought events, healthy trees displayed a recovery in the trade-off among aboveground growth, whereas declining trees did not exhibit a similar recovery. When examining the influence of environmental factors, a high average temperature before the growing season negatively affected the growth of branches and needles, irrespective of their health status. Concurrently, the needle length and tree-ring width of Korean fir trees decreased with a decrease in soil pH and cation content. However, stem growth tended to favor more than needle growth with abundant soil nutrients. Overall, high temperatures preceding the growing season and soil acidification serve as crucial factors influencing aboveground growth and the trade-off relationship in Korean fir trees. These findings are expected to contribute to enhancing forest management strategies for conserving this declining species in their natural habitat.</div></div>","PeriodicalId":54264,"journal":{"name":"Global Ecology and Conservation","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142356771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}