Limnology and Oceanography Letters最新文献

{"title":"Combined exposure to CO2 and H2S significantly reduces the performance of the Mediterranean seagrass Posidonia oceanica: Evidence from a volcanic vent","authors":"Geraldina Signa,&nbsp;Valentina Sciutteri,&nbsp;Agostino Tomasello,&nbsp;Valentina Costa,&nbsp;Silvia Casabianca,&nbsp;Giovanna Cilluffo,&nbsp;Cristina Andolina,&nbsp;Salvatrice Vizzini","doi":"10.1002/lol2.10368","DOIUrl":"10.1002/lol2.10368","url":null,"abstract":"<p>Although seagrasses are expected to thrive in future acidified oceans by overcoming low CO₂ diffusion into plant tissues, the co-occurrence of environmental stressors may affect their growth. Volcanic CO₂ vents are often associated with toxic gases and metal-rich fluids representing ideal sites to assess the effects of multiple stressors. We evaluated the response of <i>Posidonia oceanica</i> growing near shallow CO₂ vents characterized by H₂S spill-out by comparing meadow structure and phenology to an area with no gas emissions. Seagrass descriptors at meadow, shoot and leaf level indicated that <i>P. oceanica</i> experienced stressful conditions at the vent area, in clear contrast to the flourishing features of <i>P. oceanica</i> previously described at CO₂ vents with no evidence of toxic inputs. Furthermore, the reduction in both leaf δ³⁴S and growth at the vent area indicates that sulfide intrusion occurs and affects seagrass growth performance, dampening the expected beneficial effects of high CO₂ levels.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10368","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141091960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unveiling differential thermal sensitivities in marine phytoplankton within the China Seas","authors":"Changyun Wang,&nbsp;Shujie Cai,&nbsp;Zhuyin Tong,&nbsp;Jixin Chen,&nbsp;Lizhen Lin,&nbsp;Wupeng Xiao,&nbsp;Xin Liu,&nbsp;Bangqin Huang","doi":"10.1002/lol2.10411","DOIUrl":"10.1002/lol2.10411","url":null,"abstract":"<p>In this study, we explored the realized thermal sensitivities of various phytoplankton groups in natural seawater, a crucial aspect for understanding the dynamics of marine ecosystems under climate change. Utilizing a decadal pigment dataset (2002–2015) from China Seas and employing generalized additive mixed models coupled with maximum entropy modeling, we discerned thermal sensitivity differentiations among nine phytoplankton groups, encompassing the full-size spectrum. Our findings revealed that cryptophytes were exceptionally thermally sensitive, with a strong correlation between temperature changes and biomass variance. Characterized by a preference for cooler waters, cryptophytes had a low mean temperature niche and a narrow niche breadth. Notably, they exhibited the lowest temperature tipping point, highlighting their heightened vulnerability to warming trends. These findings underscored the significance of cryptophytes, an often-overlooked group, in understanding ecosystem responses to climate shifts, and emphasized their potential role as key indicators in marine ecological studies under global warming.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10411","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141091917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stream CO2 emissions are overestimated without consideration of diel water and atmospheric CO2 variability","authors":"Theresa Reichenpfader,&nbsp;Katrin Attermeyer","doi":"10.1002/lol2.10405","DOIUrl":"10.1002/lol2.10405","url":null,"abstract":"<p>Streams are significant emitters of carbon dioxide (CO₂) to the atmosphere that are influenced by diel CO₂ dynamics. However, we know little about diel CO₂ variability within streams, the diel dynamics of CO₂ in the air above streams, and the consequences for emission calculations. We studied five pre-alpine streams by equipping three sites per stream in close proximity (~ 1 km apart) with automatic logging stations that continuously recorded water and air CO₂ partial pressures (pCO₂) for 2–4 d. All streams and sites showed increased pCO₂ at night and decreased pCO₂ during the day, however, with fourfold higher diel amplitudes for atmospheric pCO₂ compared to the water. Calculating diffusive CO₂ fluxes with fixed compared to dynamic measured atmospheric CO₂ resulted in negligible to 431% lower estimates. We might thus currently overestimate fluvial CO₂ emissions and should include diel water and air CO₂ variability to more accurately assess stream CO₂ emissions.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10405","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140954171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Global subterranean estuaries modify groundwater nutrient loading to the ocean","authors":"Stephanie J. Wilson,&nbsp;Amy Moody,&nbsp;Tristan McKenzie,&nbsp;M. Bayani Cardenas,&nbsp;Elco Luijendijk,&nbsp;Audrey H. Sawyer,&nbsp;Alicia Wilson,&nbsp;Holly A. Michael,&nbsp;Bochao Xu,&nbsp;Karen L. Knee,&nbsp;Hyung-Mi Cho,&nbsp;Yishai Weinstein,&nbsp;Adina Paytan,&nbsp;Nils Moosdorf,&nbsp;Chen-Tung Aurthur Chen,&nbsp;Melanie Beck,&nbsp;Cody Lopez,&nbsp;Dorina Murgulet,&nbsp;Guebuem Kim,&nbsp;Mathew A. Charette,&nbsp;Hannelore Waska,&nbsp;J. Severino P. Ibánhez,&nbsp;Gwénaëlle Chaillou,&nbsp;Till Oehler,&nbsp;Shin-ichi Onodera,&nbsp;Mitsuyo Saito,&nbsp;Valenti Rodellas,&nbsp;Natasha Dimova,&nbsp;Daniel Montiel,&nbsp;Henrietta Dulai,&nbsp;Christina Richardson,&nbsp;Jinzhou Du,&nbsp;Eric Petermann,&nbsp;Xiaogang Chen,&nbsp;Kay L. Davis,&nbsp;Sebastien Lamontagne,&nbsp;Ryo Sugimoto,&nbsp;Guizhi Wang,&nbsp;Hailong Li,&nbsp;Américo I. Torres,&nbsp;Cansu Demir,&nbsp;Emily Bristol,&nbsp;Craig T. Connolly,&nbsp;James W. McClelland,&nbsp;Brenno J. Silva,&nbsp;Douglas Tait,&nbsp;BSK Kumar,&nbsp;R. Viswanadham,&nbsp;VVSS Sarma,&nbsp;Emmanoel Silva-Filho,&nbsp;Alan Shiller,&nbsp;Alanna Lecher,&nbsp;Joseph Tamborski,&nbsp;Henry Bokuniewicz,&nbsp;Carlos Rocha,&nbsp;Anja Reckhardt,&nbsp;Michael Ernst Böttcher,&nbsp;Shan Jiang,&nbsp;Thomas Stieglitz,&nbsp;Houégnon Géraud Vinel Gbewezoun,&nbsp;Céline Charbonnier,&nbsp;Pierre Anschutz,&nbsp;Laura M. Hernández-Terrones,&nbsp;Suresh Babu,&nbsp;Beata Szymczycha,&nbsp;Mahmood Sadat-Noori,&nbsp;Felipe Niencheski,&nbsp;Kimberly Null,&nbsp;Craig Tobias,&nbsp;Bongkeun Song,&nbsp;Iris C. Anderson,&nbsp;Isaac R. Santos","doi":"10.1002/lol2.10390","DOIUrl":"10.1002/lol2.10390","url":null,"abstract":"<p>Terrestrial groundwater travels through subterranean estuaries before reaching the sea. Groundwater-derived nutrients drive coastal water quality, primary production, and eutrophication. We determined how dissolved inorganic nitrogen (DIN), dissolved inorganic phosphorus (DIP), and dissolved organic nitrogen (DON) are transformed within subterranean estuaries and estimated submarine groundwater discharge (SGD) nutrient loads compiling &gt; 10,000 groundwater samples from 216 sites worldwide. Nutrients exhibited complex, nonconservative behavior in subterranean estuaries. Fresh groundwater DIN and DIP are usually produced, and DON is consumed during transport. Median total SGD (saline and fresh) fluxes globally were 5.4, 2.6, and 0.18 Tmol yr⁻¹ for DIN, DON, and DIP, respectively. Despite large natural variability, total SGD fluxes likely exceed global riverine nutrient export. Fresh SGD is a small source of new nutrients, but saline SGD is an important source of mostly recycled nutrients. Nutrients exported via SGD via subterranean estuaries are critical to coastal biogeochemistry and a significant nutrient source to the oceans.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10390","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140953482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The elephant in the conference room: reducing the carbon footprint of aquatic science meetings","authors":"Marie-Elodie Perga,&nbsp;Thorsten Dittmar,&nbsp;Damien Bouffard,&nbsp;Emma Kritzberg","doi":"10.1002/lol2.10402","DOIUrl":"10.1002/lol2.10402","url":null,"abstract":"&lt;p&gt;The ASLO community is firmly committed to a sustainable future, and themes of the past conferences often infer a link between aquatic systems evolution and climate change. At the latest Aquatic Sciences Meeting (ASM) in 2023, climate change and carbon-centered topics were salient themes, making up to 50% of all contributions (Fig. 1). Many keynotes were remarked on for their willingness to engage toward actions and solutions and go beyond the sole report of dangers and threats posed by climate change and other overpassed planetary limits.&lt;/p&gt;&lt;p&gt;Taking part in international scientific conferences such as ASM makes an integrated component of our academic life. Expectations from scientific conferences are to provide an opportunity to stay informed about the latest developments, disseminate one's own research, discuss perspectives and ideas, and get inspired. Scientific conferences also foster a sense of belonging to a community and offer a social context in which to expand research networks. In line with this, academic incentives and travel support are high and on the rise (Bojica et al. &lt;span&gt;2022&lt;/span&gt;). Yet, scientific conferencing also generates significant CO&lt;sub&gt;2&lt;/sub&gt; emissions at the Worldwide scale. Eighty percent of the carbon footprint of international conferences is made up of air travel, with a lower estimate of roughly 1 tCO&lt;sub&gt;2−e&lt;/sub&gt; (metric tons of carbon dioxide equivalent, that is, the number of metric tons of CO&lt;sub&gt;2&lt;/sub&gt; emissions with the same global warming potential as one metric ton of another greenhouse gas) emitted per attendee for transportation (Klower et al. &lt;span&gt;2020&lt;/span&gt;; Tao et al. &lt;span&gt;2021&lt;/span&gt;). If half of the 8 million worldwide academics were to take part annually in an international conference (Sarabipour et al. &lt;span&gt;2021&lt;/span&gt;), transporting academics to international conferences would generate a back-of-the-envelope estimate of 4 MtCO&lt;sub&gt;2−e&lt;/sub&gt;, rivaling with annual emissions of countries such as Niger, Nicaragua, or Latvia (Crippa et al. &lt;span&gt;2022&lt;/span&gt;).&lt;/p&gt;&lt;p&gt;Meeting the Paris Agreement to contain warming to the 1.5°C target requires that the emissions per capita fall down to 2.3 tCO&lt;sub&gt;2−e&lt;/sub&gt; by 2030 (Gore &lt;span&gt;2021&lt;/span&gt;), while, due to their hypermobile lifestyle, the sole professional travel-related annual emissions for academics can easily reach 6 tCO&lt;sub&gt;2−e&lt;/sub&gt; per capita (Ciers et al. &lt;span&gt;2019&lt;/span&gt;). The significance of the carbon footprint of scientific conferences has led individual academics and scientific societies to question the current model for conferencing (Malcolm &lt;span&gt;2008&lt;/span&gt;; Achten et al. &lt;span&gt;2013&lt;/span&gt;; Arsenault et al. &lt;span&gt;2019&lt;/span&gt;; Klower et al. &lt;span&gt;2020&lt;/span&gt;; Tao et al. &lt;span&gt;2021&lt;/span&gt;). Despite extending beyond our immediate community, this issue holds particular significance for us within the ASLO community, as we travel the World and generate such greenhouse emissions specifically to meet and devise climate-related matters a","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10402","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140910593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Short wave attenuation by a kelp forest canopy","authors":"M. Lindhart,&nbsp;M. A. Daly,&nbsp;H. Walker,&nbsp;I. B. Arzeno-Soltero,&nbsp;J. Z. Yin,&nbsp;T. W. Bell,&nbsp;S. G. Monismith,&nbsp;G. Pawlak,&nbsp;J. J. Leichter","doi":"10.1002/lol2.10401","DOIUrl":"10.1002/lol2.10401","url":null,"abstract":"<p>Giant kelp (<i>Macrocystis pyrifera</i>) forests are common along the California coast. Attached on the rocky bottom at depths of approximately 5–25 m, the kelp, when mature, spans the water column and develops dense, buoyant canopies that interact with waves and currents. We present two novel results based on observations of surface gravity waves in a kelp forest in Point Loma, California. First, we report short wave (1–3 s) attenuation in kelp, quantified by an exponential decay coefficient <span></span><math>\u0000 <mrow>\u0000 <mi>α</mi>\u0000 <mo>∼</mo>\u0000 <mi>O</mi>\u0000 <mfenced>\u0000 <mrow>\u0000 <msup>\u0000 <mn>10</mn>\u0000 <mrow>\u0000 <mo>−</mo>\u0000 <mn>3</mn>\u0000 </mrow>\u0000 </msup>\u0000 <msup>\u0000 <mi>m</mi>\u0000 <mrow>\u0000 <mo>−</mo>\u0000 <mn>1</mn>\u0000 </mrow>\u0000 </msup>\u0000 </mrow>\u0000 </mfenced>\u0000 </mrow></math>—comparable to the dampening effect of sea ice. Second, we identify seasonal and tidal changes in attenuation, peaking mid-summer with maximum kelp cover, and during low tide when a greater proportion of the fronds are at the surface. Thus, the naturally occurring surface canopies of kelp forests can act as temporally varying, high-frequency filters of wave energy.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10401","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140907310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Species richness and intraspecific variation interactively shape marine diatom community functioning","authors":"Patrick K. Thomas,&nbsp;Marrit Jacob,&nbsp;Esteban Acevedo-Trejos,&nbsp;Helmut Hillebrand,&nbsp;Maren Striebel","doi":"10.1002/lol2.10398","DOIUrl":"10.1002/lol2.10398","url":null,"abstract":"<p>Biodiversity generally increases productivity in ecosystems; however, this is mediated by the specific functional traits that come with biodiversity loss or gain and how these traits interact with environmental conditions. Most biodiversity studies evaluate the effects of species richness alone, despite our increasing understanding that intraspecific diversity can have equally strong impacts. Here, we manipulate both species richness and intraspecific richness (i.e., number of distinct strains) in marine diatom communities to explicitly test the relative importance of species and strain richness for biomass and trait diversity in six distinct temperature/nutrient environments. We show that species and strain richness both have significant effects on biomass and growth rates, but more importantly, they interact with each other, indicating that cross-species diversity effects depend on within-species diversity and vice versa. This intertwined relationship thus calls for more integrative approaches quantifying the relative importance of distinct biodiversity components and environmental context on ecosystem functioning.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10398","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140895389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing N2 fixation flux and its controlling factors in the (sub)tropical western North Pacific through high‐resolution observations","authors":"Xinran Yu, Zuozhu Wen, Ruotong Jiang, Jin‐Yu Terence Yang, Zhimian Cao, Haizheng Hong, Yuntao Zhou, Dalin Shi","doi":"10.1002/lol2.10404","DOIUrl":"https://doi.org/10.1002/lol2.10404","url":null,"abstract":"The (sub)tropical western North Pacific is potentially an area of intense nitrogen (N<jats:sub>2</jats:sub>) fixation in the global ocean, despite limited understanding of the flux and controlling factors. We conducted high‐resolution observations from 2016 to 2021 in this region and used machine learning algorithms to simulate N<jats:sub>2</jats:sub> fixation flux. Models estimated an N<jats:sub>2</jats:sub> fixation flux from 5.72 to 6.45 Tg N yr<jats:sup>−1</jats:sup>, with strong seasonal variation and peak rates in summer. The western North Pacific Subtropical Gyre and the Kuroshio Current contributed more to N<jats:sub>2</jats:sub> fixation flux than did the adjacent areas. Models suggested that sea surface temperature, photosynthetically available radiation, and nutrient supply were most strongly correlated with seasonal and spatial variations in N<jats:sub>2</jats:sub> fixation. This study provides an improved estimation of N<jats:sub>2</jats:sub> fixation in the western North Pacific and advances our understanding of its role in ocean productivity.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":null,"pages":null},"PeriodicalIF":7.8,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140821777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Qualitative and quantitative changes in phenology of chlorophyll a concentrations during the transition from eutrophy to oligotrophy","authors":"Dietmar Straile,&nbsp;Karl-Otto Rothhaupt","doi":"10.1002/lol2.10403","DOIUrl":"10.1002/lol2.10403","url":null,"abstract":"<p>The PEG (Plankton Ecology Group) model predicts differences in phenology between eutrophic and oligotrophic lakes regarding the occurrence, timing and magnitude of annual chlorophyll maxima and minima. While these predictions have been tested between lakes, hardly any tests exist using long-term data. We test these predictions using chlorophyll time-series (1980–2019) from Lake Constance in which trophic status shifted from eutrophic to oligotrophic conditions. We show that oligotrophication subsequently resulted in reduction of the summer and spring blooms, and finally the loss of the clear-water phase. In contrast to the PEG model the spring bloom was not delayed, but advanced with oligotrophication. Warming modified the seasonal patterns via advancing clear-water timing. Oligotrophication did not only influence phenologies, but also the importance of independent variables driving phenologies. Thus, the decline of nutrients was the dominant factor in shaping the seasonal patterns of chlorophyll in Lake Constance during the last four decades.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10403","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140821562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Key bacterial groups maintain stream multifunctionality in response to episodic drying","authors":"Giulia Gionchetta,&nbsp;Rebeca Arias-Real,&nbsp;Pilar Hurtado,&nbsp;Helmut Bürgmann,&nbsp;Cayetano Gutiérrez-Cánovas","doi":"10.1002/lol2.10400","DOIUrl":"10.1002/lol2.10400","url":null,"abstract":"<p>Microbial biodiversity is fundamental to maintain ecosystem functioning in seasonally variable ecosystems. However, it remains unclear how alterations in water availability caused by episodic drying compromise the ability of stream microbes to maintain multiple functions simultaneously (e.g., primary production and carbon cycling). Using data from 32 streams, we investigated how the phenology of annual drying influences stream sediment microbial biodiversity and their capacity to sustain multifunctionality. Our results showed that stream multifunctionality and most bacteria did not respond to changes in drying phenology. Only two bacterial groups, the drying-resistant Sphingobacteriia and the drying-sensitive Acidobacteria_Gp7, exhibited positive associations with multifunctionality; whereas, bacterial diversity showed a negative correlation with functions. Among these biodiversity aspects, Sphingobacteriia showed the strongest capacity to maintain multifunctionality at low and moderate performance levels. Our findings will help to better understand the mechanisms through which biodiversity sustains the functioning of seasonally variable streams and their responses to global change.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":null,"pages":null},"PeriodicalIF":7.8,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10400","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140817626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}