Journal of Arid Environments最新文献_第6页

Spatial and temporal patterns and driving factors of carbon in green great wall project, Africa 非洲绿色长城工程碳排放时空格局及驱动因素

IF 2.5 3区环境科学与生态学 Q2 ECOLOGY

Journal of Arid Environments

Pub Date : 2025-10-01 DOI: 10.1016/j.jaridenv.2025.105493

Joshua Joas Barabara , Zian Liu , Zhenglin Tian , Hongpeng Liu , Faris Jamal Mohamedi , Tongpeng Wang , Chengyuan Wang , Xuegang Mao

Net Primary Production (NPP) is a critical indicator of vegetative growth status, carbon sequestration capacity, and overall terrestrial ecosystem productivity, thereby contributing significantly to global ecological stability. In the Africa Sahel region, as well as the largest ecological project in Africa——The Green Great Wall, characterized by diverse and dynamic ecosystems, the quantification of vegetation degradation and NPP variability remains limited and uncertain. Therefore, this study provides substantiating evidence to support the enhancement and preservation of vegetative ecosystems in the Sahel region by analyzing spatial and temporal variations in NPP and its driving factors from 2001 to 2020. The Theil-Sen median and the Mann-Kendall significance test were employed to evaluate the NPP spatio-temporal patterns, while the geographical detector model was implemented to measure the influence of environmental variables within the Great Green Wall corridor. We found that the NPP exhibited an upward trend, with 121.97 gC m⁻² annual average between 2001 and 2020. Over the past two decades of the Green Great Wall Project, approximately 40 % of the region exhibited an increase in NPP, 7 % experienced a decline, while 53 % remained desert or bare land. Spatially, the highest observed NPP was recorded in Ethiopia at 556.23 gC m⁻² yr⁻¹, while the lowest value observed was in Niger at 0.43 gC m⁻² yr⁻¹. The geographical detector analysis indicated that temperature and precipitation emerged as the dominant climatic driver of NPP variability, while interaction analysis revealed that the combined influence of precipitation and temperature had the strongest effect on NPP dynamics during the study period. Our findings offer regional evidence for evaluating the benefits of forestry ecological projects in arid zones, contributing to enhanced ecological well-being and resilience in Africa, and providing valuable insights for advancing the Sustainable Development Goals.

净初级生产力（NPP）是衡量植被生长状况、固碳能力和陆地生态系统整体生产力的重要指标，对全球生态稳定性有重要贡献。在非洲萨赫勒地区，以及非洲最大的生态工程“绿色长城”，以生态系统的多样性和动态为特征，植被退化和NPP变率的量化仍然有限和不确定。因此，本研究通过分析2001 - 2020年NPP的时空变化及其驱动因素，为支持萨赫勒地区植被生态系统的增强和保护提供了实证证据。采用Theil-Sen中值和Mann-Kendall显著性检验评价NPP的时空格局，采用地理探测器模型衡量绿色长城走廊内环境变量的影响。结果表明，2001 ~ 2020年NPP呈上升趋势，年平均为121.97 gC m−2。在绿色长城工程实施的20年间，约40%的区域NPP增加，7%的区域NPP下降，而53%的区域仍为沙漠或光秃秃的土地。在空间上，埃塞俄比亚观测到的NPP最高，为556.23 gC m−2 yr−1，尼日尔观测到的NPP最低，为0.43 gC m−2 yr−1。地理探测器分析表明，温度和降水是NPP变化的主要气候驱动因子，而交互作用分析表明，降水和温度对NPP变化的综合影响最为强烈。我们的研究结果为评估干旱地区林业生态项目的效益提供了区域证据，有助于提高非洲的生态福祉和恢复力，并为推进可持续发展目标提供了有价值的见解。

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引用次数: 0

The potential of Sentinel-1 for monitoring forage productivity in Rangeland Ecosystems: A review Sentinel-1在草地生态系统牧草生产力监测中的潜力综述

IF 2.5 3区环境科学与生态学 Q2 ECOLOGY

Journal of Arid Environments

Pub Date : 2025-09-30 DOI: 10.1016/j.jaridenv.2025.105494

Monde Rapiya , Nasiphi Ngcoliso , Mcebisi Qabaqaba , Wayne Truter , Abel Ramoelo

Rangelands are vital ecosystems that support forage production essential for livestock and biodiversity conservation, yet they face increasing degradation driven by anthropogenic pressures and climate variability. Remote sensing technologies offer scalable and non-destructive means to monitor forage productivity, with optical sensors limited by cloud cover and dense vegetation saturation. Synthetic Aperture Radar (SAR), particularly from the Sentinel-1 constellation, provides all-weather, high-resolution data capable of capturing structural and moisture-related vegetation attributes. This review evaluates the potential of Sentinel-1 SAR data for assessing and monitoring forage productivity in rangeland ecosystems. It highlights recent applications demonstrating Sentinel-1's effectiveness in forage productivity estimation and its integration with optical sensors like Sentinel-2 to enhance monitoring accuracy. Despite its advantages, challenges such as spatial resolution constraints, ecological sensitivity, and complex data processing impede full operational deployment. Future directions emphasize advanced data fusion techniques, machine learning approaches, and enhanced preprocessing algorithms to optimize Sentinel-1's utility. Integrating SAR with optical datasets promises to facilitate scalable, cost-effective, and reliable rangeland management strategies, supporting sustainable forage utilization and ecosystem resilience. Therefore, governments, the private sector, and NGOs should invest in Earth Observation infrastructure and capacity-building to translate remote sensing into actionable policies that promote sustainable rangeland management, climate change adaptation, and food security.

牧场是重要的生态系统，支持对牲畜和生物多样性保护至关重要的饲料生产，但由于人为压力和气候变化，它们面临着日益严重的退化。遥感技术提供了可扩展和非破坏性的手段来监测饲料生产力，光学传感器受云层覆盖和茂密植被饱和度的限制。合成孔径雷达（SAR），特别是来自Sentinel-1星座的SAR，提供全天候、高分辨率的数据，能够捕获与结构和湿度相关的植被属性。本文综述了Sentinel-1 SAR数据在评估和监测草地生态系统牧草生产力方面的潜力。它强调了最近的应用，证明了Sentinel-1在牧草生产力估计方面的有效性，以及它与Sentinel-2等光学传感器的集成，以提高监测精度。尽管具有优势，但空间分辨率限制、生态敏感性和复杂的数据处理等挑战阻碍了全面的操作部署。未来的方向强调先进的数据融合技术、机器学习方法和增强的预处理算法，以优化Sentinel-1的效用。将SAR与光学数据集相结合，有望促进可扩展、具有成本效益和可靠的牧场管理策略，支持可持续的饲料利用和生态系统恢复力。因此，政府、私营部门和非政府组织应该投资于地球观测基础设施和能力建设，将遥感转化为可操作的政策，促进可持续的牧场管理、气候变化适应和粮食安全。

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引用次数: 0

The benefits of a nurse plant, shade cloth, and nurse rock on Carnegiea gigantea (saguaro) growth and survival shift along a stress gradient 护理植物、遮荫布和护理岩对巨鳄的生长和生存的好处沿着应力梯度变化

IF 2.5 3区环境科学与生态学 Q2 ECOLOGY

Journal of Arid Environments

Pub Date : 2025-09-26 DOI: 10.1016/j.jaridenv.2025.105492

Helen I. Rowe , Mary Fastiggi , Debbie Langenfeld , Scott Milne , John Parente , Giavanna Raboin , Nikhil Sethi , Madelaine Stockman , Melanie Tluczek

Facilitation tends to be prevalent in arid lands as exemplified by nurse plant relationships. Carnegia gigantea (saguaro), a foundation species in the Sonoran Desert, faces threats of climate change and changing fire regimes. Since it is known to depend on nurse plants, restoring saguaros post-fire or plantings to support regeneration of the species will also require consideration of nurse plants. We sought to understand the specific tradeoffs and mechanisms of planting saguaros with nurse plants or structures mimicking nurse plants. We planted 40 saguaro plants in individual plots with a fully crossed combination of nurse plants, nurse rock, or shade cloth, and controls with five replicates in an outside planter in Scottsdale, Arizona, USA. We watered plots for ten months before turning off the irrigation. Saguaros grew best without nurse plants and nurse rocks in the first year, but only 15 survived the second summer without supplemental water, and of those, 14 were under nurse plants. Photosynthetically active radiation was associated with saguaro survival but not mycorrhizal inoculum potential or temperature. Nurse plants, but not treatments mimicking nurse plants, clearly facilitated saguaro survival under drought conditions, outweighing competition for light and slower growth.

促进在干旱地区普遍存在，看护植物关系就是例证。仙人掌是索诺兰沙漠的基础物种，面临着气候变化和火灾制度变化的威胁。由于已知它依赖于护理植物，因此在火灾后恢复或种植以支持物种再生也需要考虑护理植物。我们试图了解与护理植物或模仿护理植物的结构种植树蛙的具体权衡和机制。我们在美国亚利桑那州斯科茨代尔的一个室外种植槽中，用护理植物、护理石或遮荫布的完全杂交组合在单个地块上种植了40株仙人掌，并进行了5个重复的对照。我们灌溉了十个月才停止灌溉。第一年在没有看护植物和看护石的情况下长得最好，但在没有补充水分的情况下，第二年只有15个存活下来，其中14个在看护植物下。光合有效辐射与南瓜存活率有关，但与菌根接种势和温度无关。护理植物，而不是模仿护理植物的处理，显然促进了壁虎在干旱条件下的生存，超过了光照和生长缓慢的竞争。

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引用次数: 0

Rediscovering desert ghosts: new records and range extensions of the sand cat and Saharan striped polecat in Libya 重新发现沙漠幽灵：利比亚沙猫和撒哈拉条纹狸的新记录和范围扩展

IF 2.5 3区环境科学与生态学 Q2 ECOLOGY

Journal of Arid Environments

Pub Date : 2025-09-25 DOI: 10.1016/j.jaridenv.2025.105485

Firas Hayder , Zimkitha J.K. Madikiza , Mohammed Saed Husayn Almuntasir , Ahmed Jomaa Sahbana , Abdullah Mokhtar Mabrok , Mohammed Sidi Hasan , Emmanuel Do Linh San

This study presents the first confirmed records of the sand cat (Felis margarita) in Libya, supported by multiple sightings documented through photographs and videos. Thirteen records were from the southwestern region, which may represent a key stronghold for the species in the country. Additionally, eight new records of the Saharan striped polecat (Poecilictis libyca) were documented across southwestern Libya, seven of which lie outside the current IUCN range for the species. These findings significantly expand the known distribution of both species and highlight a major knowledge gap. Reports of both species being sold in local markets further underscore the urgent need for targeted conservation efforts, public awareness and continued field surveys to better delineate the distribution limits of these small carnivores in Libya.

这项研究首次证实了利比亚的沙猫（Felis margarita），并通过照片和视频记录了多次目击。13条记录来自西南地区，这可能代表了该物种在该国的关键据点。此外，在利比亚西南部记录了8个撒哈拉条纹狸（Poecilictis libyca）的新记录，其中7个位于目前IUCN对该物种的保护范围之外。这些发现大大扩展了这两个物种的已知分布，并突出了一个主要的知识差距。关于这两个物种在当地市场被出售的报告进一步强调了迫切需要有针对性的保护工作，公众意识和持续的实地调查，以更好地划定这些小型食肉动物在利比亚的分布界限。

引用次数: 0

Biochar-mediated improvements in soil health in drylands: A bibliometric review of the potential and mechanisms for combating desertification and climate change 生物炭介导的旱地土壤健康改善：防治荒漠化和气候变化的潜力和机制的文献计量学综述

IF 2.5 3区环境科学与生态学 Q2 ECOLOGY

Journal of Arid Environments

Pub Date : 2025-09-24 DOI: 10.1016/j.jaridenv.2025.105490

Marina Pedroso Carneiro , Fernanda Palmeira Gabetto , Francielle Medeiros Costa , Viviana Meneghini , Juliet Emilia Santos de Sousa , Gonçalo Amarante Guimarães Pereira , Maurício Roberto Cherubin

Climate change has increased the vulnerability in dryland regions, which are more often facing challenges associated with water scarcity and low crop yields. In this context, sustainable soil management practices are a valuable tool to enhance the resilience of these areas as they can provide environmental benefits while ensuring fiber and food production. Among these practices, biochar use has gained recent attention due to its potential to enhance soil health; however, there is a lack of studies that synthesize the existing published data to guide future research. Therefore, we performed a bibliometric review to assess the current research status of soil health studies on biochar use in dryland soils. A total of 38 documents published between 2013 and 2024 were selected from the Web of Science and Scopus databases to be included in our analysis. Our results show that China leads in the number of publications, followed by Pakistan and Iran, which highlights the existence of research gaps in sub-Saharan Africa, Latin America, and parts of the Middle East and Europe. The most commonly evaluated properties in these studies to assess soil health were pH and phosphorus for chemical-associated parameters, and soil organic carbon and bulk density for biological and physical attributes, respectively. Physical parameters were the least commonly evaluated by the soil health studies with biochar application in drylands, despite their relevance. Research in the area highlights the overall potential of biochar to increase key parameters associated with land conservation in dry areas, such as nutrient availability, water retention, carbon sequestration, and crop productivity. However, research conducted on this matter remains limited and unevenly distributed. We recommend that future studies should address regional gaps and explore long-term effects under field conditions to enhance the current understanding of the benefits associated with biochar use in drylands.

气候变化增加了干旱地区的脆弱性，这些地区更经常面临与水资源短缺和作物产量低有关的挑战。在这种情况下，可持续土壤管理做法是加强这些地区恢复力的宝贵工具，因为它们可以在确保纤维和粮食生产的同时提供环境效益。在这些做法中，生物炭的使用因其具有增强土壤健康的潜力而最近受到关注；然而，缺乏综合现有已发表数据来指导未来研究的研究。因此，我们进行了文献计量学综述，以评估生物炭在旱地土壤中利用的土壤健康研究现状。我们从Web of Science和Scopus数据库中选择了2013年至2024年间发表的38篇文献纳入我们的分析。我们的研究结果显示，中国在发表论文数量上领先，其次是巴基斯坦和伊朗，这凸显了撒哈拉以南非洲、拉丁美洲以及中东和欧洲部分地区存在的研究差距。在这些评估土壤健康的研究中，最常评估的属性分别是pH和磷的化学相关参数，以及土壤有机碳和体积密度的生物和物理属性。在旱地应用生物炭的土壤健康研究中，尽管物理参数具有相关性，但它们最不常被评估。该领域的研究强调了生物炭在提高干旱地区与土地保护相关的关键参数方面的总体潜力，如养分有效性、保水能力、碳固存能力和作物生产力。然而，对这一问题的研究仍然有限且分布不均。我们建议未来的研究应该解决区域差距，并探索在野外条件下的长期影响，以加强目前对旱地使用生物炭的好处的理解。

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引用次数: 0

Microtextural patterns as an archive of geomorphic and pedogenic response to anthropogenic humidification in an arid dune system (Morocco) 微结构模式作为干旱沙丘系统对人为加湿的地貌和成土响应档案（摩洛哥）

IF 2.5 3区环境科学与生态学 Q2 ECOLOGY

Journal of Arid Environments

Pub Date : 2025-09-20 DOI: 10.1016/j.jaridenv.2025.105491

Rachid Amiha, Belkacem Kabbachi, Mohamed Ait Haddou, Younes Moussaid, Youssef Bouchriti

Understanding the response of arid soil-landscape systems to changes in moisture regimes is critical for assessing their stability. This study investigates the Elfeija dune field in southeastern Morocco, a site chosen for its well-preserved record of both natural climatic cycles and recent anthropogenic impacts. The process-response dynamics were investigated using quartz grain exoscopy (SEM-EDS) as a primary indicator. The analysis reveals a polyphasic history where subsequent pedogenic processes overprint primary geomorphic signatures. The initial state of the parent material is defined by a dominant suite of aeolian microtextures, including high-gloss polish and mechanical impact marks, indicative of prolonged transport in a mobile dune system. This primary surface is consistently altered by features diagnostic of incipient pedogenesis, such as chemical dissolution etching and authigenic growth of complex iron- and chlorine-rich aluminosilicate precipitates. Significantly, the recent, widespread expansion of irrigated agriculture provides a powerful modern analogue for the natural arid-humid cycles of the Quaternary.The seasonal, human-induced humidification of the sandy substrate creates the precise conditions required for these chemical alteration processes. The study concludes that the Elfeija geosite serves not only as a high-fidelity archive of past climatic shifts but also as a real-time laboratory for studying the geomorphic and pedogenic response of an arid system to modern anthropogenic forcing.

了解干旱土壤景观系统对湿度变化的响应对于评估其稳定性至关重要。本研究调查了摩洛哥东南部的Elfeija沙丘场，该地点因其保存完好的自然气候周期和最近的人为影响记录而被选中。以石英颗粒外相显微镜（SEM-EDS）为主要指标，研究了过程响应动力学。分析揭示了一个多相的历史，随后的成土过程覆盖了原始地貌特征。母体物质的初始状态由主要的风成微纹理定义，包括高光泽抛光和机械冲击痕迹，表明在移动沙丘系统中长期运输。早期成土作用的特征，如化学溶解蚀刻和复杂的富铁和富氯铝硅酸盐沉淀的自生生长，不断改变这一原始表面。值得注意的是，最近灌溉农业的广泛扩张为第四纪的自然干湿循环提供了强有力的现代模拟。季节性的、人为引起的沙质基质的加湿为这些化学变化过程创造了所需的精确条件。该研究认为，Elfeija地质遗址不仅可以作为过去气候变化的高保真档案，而且可以作为研究干旱系统对现代人为强迫的地貌和成土响应的实时实验室。

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引用次数: 0

Seasonal variation in macro and micro mineral contents of browse plants consumed by ruminants in Namibia 纳米比亚反刍动物食用的浏览植物中宏观和微观矿物质含量的季节变化

IF 2.5 3区环境科学与生态学 Q2 ECOLOGY

Journal of Arid Environments

Pub Date : 2025-09-19 DOI: 10.1016/j.jaridenv.2025.105488

Lucia N. Marius , Maria N.T. Shipandeni , Luis A. Rodríguez-Campos , Emmanuel L.K. Osafo

This study evaluated the seasonal variation of macro and micro minerals contents of woody plant leaves and their interaction: species x season. The woody plants species investigated from Daurês, Gibeon, Guinas, Kongola, Omatako and Tsandi constituencies were Senegalia mellifera, Vachellia karroo, Vachellia hereroensis, Dichrostachys cinerea, Grewia bicolor, Combretum apiculatum, Combretum collinum, Philenoptera nelsii, Terminalia prunioides, Terminalia sericea, Colophospermum mopane, Baphiam massaiensis, Bauhinia petersiana, Catophractes alexandri, Rhigozum trichotomum and Ziziphus mucronata. Leaves of woody species were collected in the wet, early-dry and late dry seasons. Minerals contents varied between species, seasons and their interactions. Species × season interactions were observed in calcium (Ca), potassium (K), magnesium (Mg) and sulphur (S). Calcium, P, Mg, K and S were affected by season (p < 0.0001). Sodium, Ca, K and S levels differed by species. Micro-mineral contents were significantly affected by species, season and their interactions (p < 0.0001) except for copper which was not influenced by season. Most woody plants meet the minimum requirement of most minerals for ruminants; however, supplementation is vital, especially during the dry season. Metabolic trials are required to understand mineral metabolism and bioavailability, and ultimately their impact on animal performance.

本研究评价了木本植物叶片宏微量矿物质含量的季节变化及其相互作用：种x季节。在Daurês、Gibeon、Guinas、Kongola、Omatako和Tsandi选区调查的木本植物有Senegalia mellifera、Vachellia karroo、Vachellia hereroensis、Dichrostachys cinerea、Grewia bicolor、Combretum apiculatum、Combretum collinum、Philenoptera nelsii、Terminalia prunioides、Terminalia sericea、Colophospermum mopane、Baphiam massaiensis、Bauhinia petersiana、Catophractes alexandri、Rhigozum trichotomum和Ziziphus mucronata。在湿季、早干季和晚干季采集了木本树种的叶片。矿物质含量因物种、季节及其相互作用而异。钙（Ca）、钾(K)、镁（Mg）和硫(S)存在种与季节的交互作用。钙、磷、镁、钾、硫受季节影响（P < 0.0001）。钠、钙、钾和硫的含量因种而异。除铜元素含量不受季节影响外，其他微量元素含量受物种、季节及其相互作用的影响显著（p < 0.0001）。大多数木本植物满足反刍动物对大多数矿物质的最低需求；然而，补充是至关重要的，特别是在旱季。代谢试验需要了解矿物质代谢和生物利用度，并最终对动物生产性能的影响。

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引用次数: 0

Impact of drought on rhizosphere microorganisms and soil environment of Bupleurum chinense 干旱对柴胡根际微生物及土壤环境的影响

IF 2.5 3区环境科学与生态学 Q2 ECOLOGY

Journal of Arid Environments

Pub Date : 2025-09-18 DOI: 10.1016/j.jaridenv.2025.105489

Xiaohan Feng , Yannan Geng , Yan Sun , Yingying Zhang , Demin Gao

The study investigated the impact of drought on the rhizosphere microorganisms of Bupleurum chinense seedlings. Soil analysis revealed that soil pH, soil organic matter (SOM), and available nitrogen decreased as drought intensity increased, while the response of available potassium (K) and phosphorus (P) was more complex. The activity of peroxidase (POD) decreased, and the activities of superoxide dismutase (SOD) and catalase (CAT) varied under different drought conditions. Amplicon sequencing results showed that moderate drought increased bacterial diversity, while severe drought decreased both bacterial and fungal diversity. Significant shifts in microbial communities were observed, with increases in Proteobacteria and actinomycetes and decreases in Acidobacteria and bifidobacteria under severe drought. As drought intensity increased, ascomycetes increased while basidiomycetes and associated flora decreased. Biomarker analysis identified specific bacterial and fungal taxa associated with different drought treatments. The study also explored the relationship between root-associated microbiota and soil factors, as well as the potential functional implications of observed changes in microbial communities. These findings highlight significant alterations in the rhizosphere microorganisms of B. chinense seedlings under drought stress and provide insights into changes in soil function and their potential impacts on soil sustainability and plant health in the rhizosphere.

研究了干旱对柴胡幼苗根际微生物的影响。土壤分析表明，随着干旱强度的增加，土壤pH、土壤有机质（SOM）和速效氮均呈下降趋势，而速效钾(K)和速效磷(P)的响应更为复杂。不同干旱条件下，过氧化物酶（POD）活性降低，超氧化物歧化酶（SOD）和过氧化氢酶（CAT）活性变化较大。扩增子测序结果显示，中度干旱增加了细菌多样性，而严重干旱减少了细菌和真菌多样性。在严重干旱条件下，微生物群落发生了显著变化，变形菌门和放线菌门增加，酸杆菌门和双歧杆菌门减少。随着干旱强度的增加，子囊菌数量增加，担子菌及其相关菌群数量减少。生物标志物分析确定了与不同干旱处理相关的特定细菌和真菌分类群。该研究还探讨了根系相关微生物群与土壤因子之间的关系，以及观察到的微生物群落变化的潜在功能意义。这些发现突出了干旱胁迫下中国白杨幼苗根际微生物的显著变化，为土壤功能的变化及其对根际土壤可持续性和植物健康的潜在影响提供了新的见解。

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引用次数: 0

Dose-dependent root phenotypic plasticity in Casuarina equisetifolia: Mechanistic insights into drought adaptation strategies for coastal sand-fixation afforestation 剂量依赖的木麻黄根系表型可塑性：沿海固沙造林干旱适应策略的机制见解

IF 2.5 3区环境科学与生态学 Q2 ECOLOGY

Journal of Arid Environments

Pub Date : 2025-09-13 DOI: 10.1016/j.jaridenv.2025.105470

Chen Fang , Qinqin Lin , Can Chen , Yu Chen , Han Lin , Guoying Pan , Chuanyang Jiang , Anqiang Xie , Xia Li

China's 17,000 km coastal shelterbelt system faces challenges in natural regeneration due to drought stress in sandy soils, particularly affecting the pioneer species Casualina equisetifolia, crucial for stabilizing these vulnerable zones. Limited understanding of drought-induced population declines hampers effective conservation strategies. To address this, we conducted pot experiments on one-year-old C. equisetifolia seedlings using polyethylene glycol (PEG-6000) to simulate drought stress, analyzing root biomass, morphology, and anatomy. Our findings reveal dose-dependent drought responses in C. equisetifolia roots. Moderate water deficit boosts root biomass through accelerated elongation, while severe stress causes a 62 % biomass reduction. Morphologically, seedlings increase root surface area (↑34 %) and tissue density (↑18 %) but reduce total length (↓27 %), with a 2.3-fold expansion of submillimeter roots (0–0.5 mm diameter) to optimize soil exploration. Anatomically, primary roots show drought hypersensitivity with a 41 % reduction in xylem conduit numbers, whereas tertiary roots compensate through increased vessel density (↑22 %) and cortical cell expansion. These adaptive strategies provide a mechanistic framework for enhancing seedling resilience in coastal afforestation programs, offering silvicultural insights for improving the survival and adaptation of C. equisetifolia in drought-prone environments.

由于沙质土壤的干旱胁迫，中国1.7万公里的沿海防护林系统面临着自然更新方面的挑战，尤其是对稳定这些脆弱地带至关重要的先锋物种木麻黄（Casualina equisetifolia）的影响。对干旱导致的种群减少的有限理解阻碍了有效的保护策略。为了解决这一问题，我们采用聚乙二醇（PEG-6000）模拟干旱胁迫，对1年生的马叶松幼苗进行盆栽试验，分析根系生物量、形态和解剖结构。我们的研究结果揭示了剂量依赖性干旱反应在马叶松根。中度水分亏缺通过加速伸长促进根系生物量，而严重胁迫导致生物量减少62%。在形态上，幼苗增加了根表面积（↑34%）和组织密度（↑18%），但减少了总长度（↓27%），亚毫米根（0-0.5 mm直径）扩大了2.3倍，以优化土壤探测。解剖学上，初生根表现出干旱超敏性，木质部导管数量减少41%，而三生根通过血管密度增加（↑22%）和皮质细胞扩张来补偿。这些适应性策略为提高沿海造林项目中幼苗的抗灾能力提供了机制框架，为提高马叶松在干旱易感环境中的生存和适应能力提供了造林方面的见解。

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引用次数: 0

Corrigendum to “Additive and substitutable prey responses to feral and native predator combinations” [J. Arid Environ. 229 (2025) 105399] “对野生和本地捕食者组合的可加性和可替代猎物反应”的勘误[J]。干旱环境，229 (2025)105399 [j]

IF 2.5 3区环境科学与生态学 Q2 ECOLOGY

Journal of Arid Environments

Pub Date : 2025-09-11 DOI: 10.1016/j.jaridenv.2025.105483

Justin R. Saint Juliana , S.S. Bleicher , S. Mukherjee , V. Sundararaj , J.S. Brown , B.P. Kotler

引用次数: 0