Oecologia最新文献_第7页

Vegetation greenness and heat load drive the movements of a water-dependent, selective grazer. 植被的绿度和热负荷驱动着依赖水的选择性食草动物的运动。

IF 2.5 2区环境科学与生态学

Oecologia Pub Date : 2026-07-30 DOI: 10.1007/s00442-026-05933-2

Kiara Avelyen Haylock, Francesca Parrini, Willem Maartin Strauss, Piet Beytell, Carl-Heinz Moeller, Robyn Sheila Hetem

{"title":"Vegetation greenness and heat load drive the movements of a water-dependent, selective grazer.","authors":"Kiara Avelyen Haylock, Francesca Parrini, Willem Maartin Strauss, Piet Beytell, Carl-Heinz Moeller, Robyn Sheila Hetem","doi":"10.1007/s00442-026-05933-2","DOIUrl":"10.1007/s00442-026-05933-2","url":null,"abstract":"Low-density, selective grazers with restricted habitat requirements may be particularly vulnerable to extinction under hotter, drier conditions expected across Africa's drylands with climate change. We evaluated how spatiotemporal variation in vegetation greenness and environmental heat load influenced movements of sable antelope, a water-dependent African grazer with selective resource requirements. We recorded hourly Global Positioning System (GPS) locations of 10 sable antelopes (Hippotragus niger) in Bwabwata National Park, Namibia, for up to 24 months, with concurrent hourly measurements of environmental heat load. As conditions became hotter and vegetation became browner during the dry season, home ranges increased in size and elongated towards the Kavango River. The 24-hour mean hourly displacement distance of sable antelopes increased in response to increased heat load and brown vegetation exposure, primarily due to more frequent long-distance movements to the Kavango River during the late dry season. Using Hidden Markov Models (HMMs), we identified four behavioural states of movement from GPS movement tracks: resting, foraging, local movement, and relocating. The relocating state, which was generally associated with directed movements to surface water, predominated during the late dry season. Sable antelopes increased both relocating and local movements, while decreasing foraging when exposed to high heat loads and brown vegetation. As conditions become increasingly hotter and drier, and resource availability becomes more unpredictable in space and time, species with specific resource requirements may face increased risk of extirpation, as walking farther to meet water requirements may compromise their already precarious energy balance during periods of resource limitation.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"208 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13424227/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148631186","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}

引用次数: 0

Wild bees occupy temporally stable pollen nutritional niches. 野蜂占据着暂时稳定的花粉营养生态位。

IF 2.5 2区环境科学与生态学

Oecologia Pub Date : 2026-07-23 DOI: 10.1007/s00442-026-05936-z

Anthony D Vaudo, Jillian A Luthy, Eva Lin, Sonja K Glasser, Anne S Leonard

{"title":"Wild bees occupy temporally stable pollen nutritional niches.","authors":"Anthony D Vaudo, Jillian A Luthy, Eva Lin, Sonja K Glasser, Anne S Leonard","doi":"10.1007/s00442-026-05936-z","DOIUrl":"10.1007/s00442-026-05936-z","url":null,"abstract":"As bees' primary source of protein and lipids, pollen is a nutritional resource key to the persistence of wild populations. Because bee taxa may differ in their pollen macronutrient requirements, and pollen is a limited resource that varies chemically across plants, nutritional niches may shape bees' ecological interactions. To explore whether members of bee communities occupy pollen nutritional niches, we analysed the protein and lipid content of pollen collected by abundant bee subgenera (Nomadopsis, Melanosmia, Eumelissodes, Pyrobombus) and observed their pollen-collecting visitation to plant species at a single Sierra Nevada meadow across three years. We compared pollen nutrition and host plant visitation among subgenera, and at the species level within Pyrobombus. Subgenera exhibited clear and temporally consistent separation of pollen load macronutrition each year, achieved by either host-plant fidelity or flexibility when foraging. Pyrobombus species shared a nutritional niche, potentially creating competition for pollen macronutrients among species relieved by their taxonomic flexibility. These results offer some of the first evidence that nutritional niches among wild bee taxa are annually stable and demonstrate how different taxa may forage to achieve nutritional consistency. Relevant to bee conservation, our findings emphasize that a nutritionally diverse array of plants may be required to support wild bee communities.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"208 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13395946/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148562714","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}

引用次数: 0

Quality, then quantity: determinants of autochthony in freshwater food webs. 质量，然后是数量：淡水食物网固有性的决定因素。

IF 2.5 2区环境科学与生态学

Oecologia Pub Date : 2026-07-23 DOI: 10.1007/s00442-026-05934-1

Juliana S Leal, Angélica L González, Natália F Souza, Lúcia F Sanches, Vinicius F Farjalla

{"title":"Quality, then quantity: determinants of autochthony in freshwater food webs.","authors":"Juliana S Leal, Angélica L González, Natália F Souza, Lúcia F Sanches, Vinicius F Farjalla","doi":"10.1007/s00442-026-05934-1","DOIUrl":"10.1007/s00442-026-05934-1","url":null,"abstract":"Understanding how resource quantity and quality shape food webs is a central question in ecology. In freshwater ecosystems, autochthonous organic matter (OM) generally offers higher nutritional quality than allochthonous OM. Although freshwater consumers may preferentially forage on limited but high-quality autochthonous OM, its scarcity often necessitates reliance on more abundant, lower-quality allochthonous OM. Using tank bromeliads as model ecosystems, we conducted a five-month field experiment to test how the dietary contribution of autochthonous OM varies with its quantity. We manipulated incident light to generate a gradient in autochthonous OM availability, evaluating whether its contribution to freshwater consumer diets increased or plateaued due to foraging preferences. We combined Bayesian stable-isotope mixing models with precision-weighted beta regression to quantify diet sources and their drivers. Across the light gradient, autochthonous OM consistently dominated consumer diets (76-95%) despite being > 1,000× less abundant than allochthonous inputs. Median autochthony increased with autochthonous supply, driven by light incidence. Maximum water storage showed a weaker, marginal negative association with autochthony after accounting for light incidence, suggesting that larger tank bromeliad ecosystems exhibited lower autochthony. This pattern may reflect the fact that tank bromeliads are living plants rather than inert containers. Larger seedlings potentially take up more nutrients from the water tanks, which likely reduces nutrient availability to autochthonous primary producers. Overall, our results support a quality-then-quantity hierarchy, in which consumers preferentially consume high-quality autochthonous OM but their realized reliance on this resource is ultimately constrained by the ecosystem's capacity to produce and retain it.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"208 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13396072/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148562634","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}

引用次数: 0

Early post-fire declines of mammals in a tree-and-shrub savanna. 森林和灌木大草原上哺乳动物火灾后早期的减少。

IF 2.5 2区环境科学与生态学

Oecologia Pub Date : 2026-07-23 DOI: 10.1007/s00442-026-05939-w

Stijn Verschueren, Maria Laura Ruozzi, Laurie Marker, Herwig Leirs, Bogdan Cristescu

{"title":"Early post-fire declines of mammals in a tree-and-shrub savanna.","authors":"Stijn Verschueren, Maria Laura Ruozzi, Laurie Marker, Herwig Leirs, Bogdan Cristescu","doi":"10.1007/s00442-026-05939-w","DOIUrl":"10.1007/s00442-026-05939-w","url":null,"abstract":"Wildfires strongly shape savanna ecosystems through vegetation restructuring, nutrient recycling and abiotic change. Post-fire habitat conditions can progressively redistribute wildlife, with differential responses between functional groups and across vegetation successional stages. Using camera traps and environmental data loggers, we monitored a large landscape (650km2) affected by a wildfire in a tree-and-shrub savanna of eastern Namibia to quantify early-phase responses of medium- to large-size mammals across burned areas, adjacent proximal zones and unburned controls. We applied a multi-season, multi-species occupancy model to six months of camera-trap data spanning one month pre-fire and five months post-fire to assess community- and functional group-level dynamics of 31 species. Burned areas experienced higher temperatures, lower humidity, and reduced vegetation growth following the wildfire. Community-level mammal occupancy declined progressively in burned areas (from 0.53 to 0.33), while remaining nearly stable in control areas (from 0.45 to 0.43) and showing small declines in proximal zones (from 0.58 to 0.52). Functional group responses differed in intensity: small carnivores and burrow-associated species showed the strongest fire-driven declines, followed by large carnivores, browsers, and grazers. Proximal areas did not function as refugia and instead showed slight occupancy declines relative to controls, indicating that fire impacts extended beyond the burned perimeter. Our findings demonstrate that drastic habitat change in the first months after a wildfire drives landscape-scale redistribution of savanna mammals, with the strongest effects on small-bodied and specialist species. These results underscore the importance of maintaining large, well-connected habitats to allow adequate space and time for recovery between fire events.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"208 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13396034/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148562618","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}

引用次数: 0

Honeydew-mediated indirect interactions: magnet and spillover effects of an invasive willow-aphid complex. 蜜露介导的间接相互作用：入侵柳树蚜虫复合体的磁体和溢出效应。

IF 2.5 2区环境科学与生态学

Oecologia Pub Date : 2026-07-23 DOI: 10.1007/s00442-026-05943-0

María Natalia Lescano, Vanina R Chalcoff, Sabrina Moreyra

{"title":"Honeydew-mediated indirect interactions: magnet and spillover effects of an invasive willow-aphid complex.","authors":"María Natalia Lescano, Vanina R Chalcoff, Sabrina Moreyra","doi":"10.1007/s00442-026-05943-0","DOIUrl":"10.1007/s00442-026-05943-0","url":null,"abstract":"Indirect interactions are key drivers of community structure, yet their role in invasion ecology remains understudied. In riparian ecosystems of northern Patagonia, invasive willows (Salix fragilis) frequently host dense colonies of the invasive giant willow aphid (Tuberolachnus salignus) that produces copious amounts of honeydew. This novel, sugar-rich resource may alter pollinators' foraging activity or spatial distribution, with cascading consequences for co-occurring native plants. We quantified the abundance and taxonomic richness of insect pollinators feeding on honeydew at invasive willows. We then conducted a randomized block experiment comparing pollinator visits to the native herb Solidago chilensis placed near (~ 25 m) and far (~ 150 m) from the complex. Honeydew from the willow-aphid complex attracted a diverse assemblage of pollinators (16 taxa across three orders), including both native and exotic species. Pollinator abundance and richness on So. chilensis were significantly higher near the complex, evidencing a positive associational effect consistent with a magnet-resource mechanism and spillover effect. Our results reveal an underexplored pathway through which biological invasions reshape ecological networks. By showing that an interaction between two invasive species can indirectly facilitate native plants via honeydew-mediated pollinator attraction, we highlight the need to consider both positive and negative indirect effects when evaluating the ecological consequences of species invasions.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"208 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148562694","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}

引用次数: 0

'Fast' and 'slow' water handling strategies explain pinyon pine decline and juniper expansion. “快”和“慢”的水处理策略解释了松的衰退和杜松的扩张。

IF 2.5 2区环境科学与生态学

Oecologia Pub Date : 2026-07-20 DOI: 10.1007/s00442-026-05929-y

Faraz Rehman, Andrew Kulmatiski, Lillian Gordon, Ryan Sandfort, Kyle A Palmquist

{"title":"'Fast' and 'slow' water handling strategies explain pinyon pine decline and juniper expansion.","authors":"Faraz Rehman, Andrew Kulmatiski, Lillian Gordon, Ryan Sandfort, Kyle A Palmquist","doi":"10.1007/s00442-026-05929-y","DOIUrl":"10.1007/s00442-026-05929-y","url":null,"abstract":"Semiarid forests in the western USA have undergone large-scale shifts in dominance due to decreasing pinyon pine abundance and increasing juniper abundance. This shift has been attributed to fast water loss in aboveground pinyon tissues during a long-term drought. Water loss, or 'outputs', however, are only a part of a plant's water budget. Water inputs, or root water uptake, are also important, but rarely well understood. We used depth-controlled tracer experiments, root water potentials, and soil water flow models to estimate pinyon and juniper inputs (root water uptake) and stomatal conductance as a proxy for water outputs. Measurements were made over two years at three sites that crossed an aridity gradient, Utah, USA. Pinyon roots were good at 'following' water through the soil, but not good at absorbing water from dry soil. Pinyon tracer uptake profiles (1-90 cm) changed more from month to month than juniper (coefficient of variation = 0.25 ± 0.02 and 0.16 ± 0.02, respectively) in ways that provided 12% more water over time. However, because pinyon roots had higher water potentials, the net water uptake advantage for pinyon was smaller: over six sampling dates, pinyon absorbed 2% more tracer than juniper. Aboveground, pinyon stomatal conductance was 25% greater than juniper. Results indicate that pinyon both absorbs and releases water faster than juniper. These 'fast' aboveground and belowground strategies place pinyon at higher risk of rapid transitions from growth to mortality than previously thought from aboveground research alone and suggests continued pinyon mortality in the future.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"208 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13385175/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148520792","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}

引用次数: 0

Field warming increases activity time, body mass and abundance of field slugs in an alpine meadow. 野外变暖增加了高山草甸的活动时间、体重和野外蛞蝓的数量。

IF 2.5 2区环境科学与生态学

Oecologia Pub Date : 2026-07-20 DOI: 10.1007/s00442-026-05938-x

Xingyu Zhou, Xiaoli Hu, Ying Feng, Shuang Xiang, Youjun Chen, Yuxia Zhang, Nico Eisenhauer, Shucun Sun

{"title":"Field warming increases activity time, body mass and abundance of field slugs in an alpine meadow.","authors":"Xingyu Zhou, Xiaoli Hu, Ying Feng, Shuang Xiang, Youjun Chen, Yuxia Zhang, Nico Eisenhauer, Shucun Sun","doi":"10.1007/s00442-026-05938-x","DOIUrl":"10.1007/s00442-026-05938-x","url":null,"abstract":"Global warming can alter not only the seasonal timing of animal activity but also daily activity, a fundamental dimension of animal behavior with important consequences for energy acquisition and species performance. Although studies have focused predominantly on global warming effects on animal phenology, the effects on daily activity remain largely unexplored. Here, we used long-term field experimental warming with large open-top chambers (15 × 15 × 2.5 m), which increased temperatures by 0.24 °C in the growing season and 0.55 °C in the non-growing season from 2017 to 2023, to determine whether warming alters daily activity time, body mass, and species abundance of the crepuscular slug Agriolimax agrestis in an alpine meadow on the eastern Tibetan Plateau. Experimental warming increased slug activity time by 37 min (+ 25%) in 2022 and 50 min (+ 29%) in 2023, and increased body mass by 65% and 57%, respectively, without changing growth phenology. To determine whether warming could directly affect slug activity time and growth, we conducted a complementary, short-term (18 days in August) experiment using small open-top chambers (2 × 2 × 2 m), which elevated temperature by 0.44 °C. Warming increased slug activity time by 180% and body mass by 36%, which was consistent with the result of the long-term experiment. Slug abundance increased by an average of 497% in warmed plots from 2019 to 2023, likely driven by enhanced survival and increased fecundity, both of which might be associated with increased body mass. Overall, warming substantially extends the slug daily activity time, with possible consequences of increased body mass and abundance, highlighting an overlooked mechanism by which climate warming may influence animal traits and demographics in cold regions.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"208 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148520803","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}

引用次数: 0

Cross-ecosystem engineers: the dual role of fruit bats in cave nutrient dynamics and landscape seed dispersal. 跨生态系统工程师：果蝠在洞穴营养动态和景观种子传播中的双重作用。

IF 2.5 2区环境科学与生态学

Oecologia Pub Date : 2026-07-20 DOI: 10.1007/s00442-026-05930-5

Maricélio de Medeiros Guimarães, Priscila Emanuela de Souza, Marconi Souza-Silva, Rodrigo Lopes Ferreira

{"title":"Cross-ecosystem engineers: the dual role of fruit bats in cave nutrient dynamics and landscape seed dispersal.","authors":"Maricélio de Medeiros Guimarães, Priscila Emanuela de Souza, Marconi Souza-Silva, Rodrigo Lopes Ferreira","doi":"10.1007/s00442-026-05930-5","DOIUrl":"10.1007/s00442-026-05930-5","url":null,"abstract":"Bats provide key ecosystem services, yet their dual role in subterranean habitats remains understudied. Frugivorous species such as Artibeus planirostris can act both as seed dispersers in surface environments and as sources of organic matter in caves through guano deposition. We investigated these functions in Toca do Morrinho Cave (Bahia, Brazil), combining captive experiments and field monitoring to assess guano production, diet, deposition patterns, and seed fate. Bats consumed fruits from 11 plant species and produced an average of 3.24 g of dry guano per day. Most feces (91.1%) were deposited outside the cave, corresponding to ~ 275 seeds per bat per day, underscoring their efficiency as seed dispersers. In contrast, only 8.9% of feces were dropped inside the cave, where seeds failed to germinate under aphotic conditions. Nevertheless, this deposition enriched the hypogean environment, providing organic matter and moisture that support invertebrate assemblages. Germination trials showed that gut passage generally preserved or enhanced seed viability, particularly for Ficus gomelleira. Our results highlight the multifunctionality of A. planirostris as both a driver of plant recruitment across landscapes and a contributor to subterranean nutrient dynamics. While seed dispersal is highly effective in epigean systems, deposition underground represents an antagonistic outcome for plants but a critical subsidy for cave communities. By linking above- and belowground ecosystems, A. planirostris functions as a cross-ecosystem engineer. Protecting its cave colonies is therefore vital not only for subterranean biodiversity but also for broader ecological processes that depend on bat-mediated connectivity.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"208 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13385164/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148520731","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}

引用次数: 0

A synthesis of stomatal sensitivity to ABA across species and experiments. 不同物种间气孔对ABA敏感性的综合及实验研究。

IF 2.5 2区环境科学与生态学

Oecologia Pub Date : 2026-07-18 DOI: 10.1007/s00442-026-05912-7

A Chaput, C Pappas, S Fatichi

{"title":"A synthesis of stomatal sensitivity to ABA across species and experiments.","authors":"A Chaput, C Pappas, S Fatichi","doi":"10.1007/s00442-026-05912-7","DOIUrl":"10.1007/s00442-026-05912-7","url":null,"abstract":"Significant effort has been put into understanding the role of abscisic acid (ABA) on stomatal response to water stress. However, the parametrization of ABA controls in current models of stomatal conductance ([Formula: see text]) remains challenging. Here, we synthesized current literature that quantifies ABA relation with [Formula: see text], water potential (Ψ), or both, across various experimental settings. We compiled a total of 242 datasets covering 60 plant species, with 193 observation sets linking [Formula: see text] and ABA and 138 observation sets linking Ψ and ABA. Ψ was measured in either the leaf, stem, or root, as reported in the corresponding studies. We examined different fitting functions to approximate the relation between Ψ and ABA, and [Formula: see text] and ABA. Statistical correlations were used to determine the best fit of [Formula: see text] vs ABA and Ψ vs ABA relationships, and to exclude datasets with poor correlations. No statistically significant differences were found between stomatal sensitivity to ABA (β, unitless) and biome type or the source of ABA (Kruskal-Wallis, P > 0.05). Statistical differences were found between β and experimental conditions (Kruskal-Wallis, P < 0.05), likely due to observational uncertainties. The overall distribution of β in all classifications suggests a typical sensitivity range (β) of 0.21 - 21.59 (median 1.87). These findings can be used to guide the development and evaluation of mechanistic models of [Formula: see text], providing realistic parameterizations of the links between ABA and stomatal closure.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"208 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148497883","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}

引用次数: 0

Climate variability reduces biomass stability in species-rich grasslands, depending on management. 气候变率降低了物种丰富草原的生物量稳定性，这取决于管理。

IF 2.5 2区环境科学与生态学

Oecologia Pub Date : 2026-07-16 DOI: 10.1007/s00442-026-05925-2

Yva Herion, Martin Andrzejak, Harald Auge, Walter Durka, Sylvia Haider, Johannes Höfner, Lotte Korell, Anna-Maria Madaj, Stefan Michalski, Erik Welk, Anke Hildebrandt, W Stanley Harpole, Christiane Roscher

{"title":"Climate variability reduces biomass stability in species-rich grasslands, depending on management.","authors":"Yva Herion, Martin Andrzejak, Harald Auge, Walter Durka, Sylvia Haider, Johannes Höfner, Lotte Korell, Anna-Maria Madaj, Stefan Michalski, Erik Welk, Anke Hildebrandt, W Stanley Harpole, Christiane Roscher","doi":"10.1007/s00442-026-05925-2","DOIUrl":"10.1007/s00442-026-05925-2","url":null,"abstract":"Climate change threatens grassland biomass stability, but combined effects of climate variability and grassland management have rarely been analyzed, constraining our ability to predict management-dependent responses. In a large field experiment in Central Germany, we assessed temporal stability of aboveground biomass and potential underlying mechanisms (dominance, asynchrony, and averaging) in non-fertilized species-rich grasslands over nine years (2015-2023). The grasslands were exposed to ambient or simulated future climate following regional projections (higher temperature and altered seasonal precipitation pattern) and were managed by mowing or sheep grazing. While the future climate treatment showed little effects, high background climate variability increased biomass variability due to lower stabilization by asynchrony and averaging, which was more pronounced in meadows than in pastures. The lower biomass resistance to extreme summer droughts and the higher recovery afterwards in meadows compared to pastures was likely attributable to higher amounts of biomass removed by mowing than by grazing. However, stabilization by the diversity-associated averaging effect, which generally contributed most to biomass stabilization, was lower in pastures compared to meadows at peak biomass production in spring, due to declining species diversity with the lower biomass removal by grazing. Accordingly, we conclude that grassland management with low biomass removal can enhance biomass resistance to climate variability, but this may be offset in the long term by species loss and reduced stabilization through the diversity-associated averaging effect.","PeriodicalId":19473,"journal":{"name":"Oecologia","volume":"208 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13375811/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148471809","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}

引用次数: 0