Limnology and Oceanography最新文献

{"title":"Multi‐endmember mixing and primary productivity drive carbonate system variability on a highly heterogeneous, shallow productive bank","authors":"F. Dylan Titmuss, Jennie E. Rheuban, Louise P. Cameron, Jonathan H. Grabowski, Zhaohui Aleck Wang","doi":"10.1002/lno.70030","DOIUrl":"https://doi.org/10.1002/lno.70030","url":null,"abstract":"This study presents the first high‐resolution spatial analysis of carbonate chemistry on Georges Bank, a highly productive shallow bank located at the southeastern edge of the Gulf of Maine. Despite numerous studies on the hydrography, nutrient chemistry, and biology, regional carbonate chemistry remains unexplored, in particular for near‐bottom conditions. Observations from cruises in May and October 2021 were used to identify multi‐endmember mixing, and a Bayesian mixing model was applied to temperature and salinity to separate water mass mixing from non‐conservative drivers such as net community production, air–sea exchange, and other biogeochemical processes/errors. Major findings from this study indicate that carbonate chemistry is highly heterogeneous and driven by multi‐endmember mixing, although biological production and respiration were notable while air–sea CO<jats:sub>2</jats:sub> exchange was minimal. Five water masses with unique carbonate chemistry were observed that varied by season and with depth, showing complexity that is uncommon in other regions along the US Atlantic coast. In both cruises, a Warm Slope Water intrusion was identified at depth that contained a strong signal of CaCO<jats:sub>3</jats:sub> dissolution during the October cruise, observed in situ for the first time in this region. Under a high emissions scenario, our results suggest that much of the bank's bottom waters may become undersaturated with respect to aragonite by 2100. Together, these findings suggest that the in situ dissolution observed may only worsen with future ocean acidification, with potentially significant implications for ecologically and economically important shellfish species on Georges Bank.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"183 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143653377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Activity and control of methanol metabolism in the seawaters across the estuary–coast–shelf continuum","authors":"Guang‐Chao Zhuang, Zhen Zhou, Shi‐Hai Mao, Shuang Li, Xiao‐Jun Li, Qiao Liu, Gui‐Peng Yang","doi":"10.1002/lno.70026","DOIUrl":"https://doi.org/10.1002/lno.70026","url":null,"abstract":"Methanol metabolism is important in marine carbon cycling, while the control of metabolic mode and activity remains poorly constrained, particularly in coastal waters. Here, we investigated the biogeochemical cycling of methanol across the estuary–coast–shelf continuum of the East China Sea. Methanol concentrations varied from &lt; 12.3 to 617.3 nmol L<jats:sup>−1</jats:sup>, decreasing from coast to shelf. The total uptake rates of methanol in the estuary (143.4 ± 29.6 nmol L<jats:sup>−1</jats:sup> d<jats:sup>−1</jats:sup>) and coast (92.3 ± 86.9 nmol L<jats:sup>−1</jats:sup> d<jats:sup>−1</jats:sup>) were much higher than those in the shelf (20.4 ± 33.8 nmol L<jats:sup>−1</jats:sup> d<jats:sup>−1</jats:sup>). While methanol was primarily used as an energy source in the coast and shelf (oxidation/total uptake: &gt; 72.2%), much more methanol was channeled to the biomass (assimilation/total uptake: 31.9–49.7%) in the estuarine waters. As supported by incubation experiments with the addition of nutrients and other C1 compounds, enhanced methanol assimilation suggests the use of methanol as a supplementary source of carbon, while reduced methanol oxidation indicated the competitive utilization of other C1 compounds as an energy source. The estuary and coastal waters acted as net sources of methanol to the atmosphere, while ventilation accounted for &lt; 5.7% of total loss, suggesting that microbial consumption was the dominant pathway of methanol removal. In the shelf, atmospheric deposition replenished surface methanol pools and contributed up to 17.5% ± 16.9% of microbial consumption. These results provided insights into the control of methanol metabolism and assessed the relative importance of different methanol sources and sinks along the estuary–coast–shelf continuum.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"199 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143635725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gross oxygen production and microbial community respiration in the oligotrophic ocean","authors":"Sara Ferrón, Karin M. Björkman, Matthew J. Church, David M. Karl","doi":"10.1002/lno.70023","DOIUrl":"https://doi.org/10.1002/lno.70023","url":null,"abstract":"Uncertainties in the temporal and spatial patterns of marine primary production and respiration limit our understanding of the ocean carbon (C) cycle and our ability to predict its response to environmental changes. Here we present a comprehensive time‐series analysis of plankton metabolism at the Hawaii Ocean Time‐series program site, Station ALOHA, in the North Pacific Subtropical Gyre. Vertical profiles of gross oxygen production (GOP) and community respiration (CR) were quantified using the <jats:sup>18</jats:sup>O‐labeled water method together with net changes in O<jats:sub>2</jats:sub> to Ar ratios during dawn to dusk in situ incubations. Rates of <jats:sup>14</jats:sup>C‐bicarbonate assimilation (<jats:sup>14</jats:sup>C‐based primary production [<jats:sup>14</jats:sup>C‐PP]) were also determined concurrently. During the observational period (April 2015 to July 2020), euphotic zone depth‐integrated (0–125 m) GOP and <jats:sup>14</jats:sup>C‐PP ranged from 35 to 134 mmol O<jats:sub>2</jats:sub> m<jats:sup>−2</jats:sup> d<jats:sup>−1</jats:sup> and 18 to 75 mmol C m<jats:sup>−2</jats:sup> d<jats:sup>−1</jats:sup>, respectively, while CR ranged from 37 to 187 mmol O<jats:sub>2</jats:sub> m<jats:sup>−2</jats:sup> d<jats:sup>−1</jats:sup>. All biological rates varied with depth and season, with seasonality most pronounced in the lower portion of the euphotic zone (75–125 m). The mean annual ratio of GOP to <jats:sup>14</jats:sup>C‐PP was 1.7 ± 0.1 mol O<jats:sub>2</jats:sub> (mol C)<jats:sup>−1</jats:sup>. While previous studies have reported convergence of GOP and <jats:sup>14</jats:sup>C‐PP with depth, we find a less pronounced vertical decline in the GOP to <jats:sup>14</jats:sup>C‐PP ratios, with GOP exceeding <jats:sup>14</jats:sup>C‐PP by 50% or more in the lower euphotic zone. Variability in CR was higher than for GOP, driving most of the variability in the balance between the two.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"24 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143627459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cyclical prey abundance drives interannual variation in predator diel vertical movement","authors":"Jonathan B. Armstrong, Mark W. Buktenica, Scott F. Girdner, Eric J. Ward","doi":"10.1002/lno.70022","DOIUrl":"https://doi.org/10.1002/lno.70022","url":null,"abstract":"Diel vertical movement (DVM) is a widespread behavior in aquatic ecosystems, occurring across a variety of taxa and water bodies. The factors hypothesized to drive DVM can vary tremendously through time, yet little is known about how DVM changes at interannual timescales. Here we explore how cyclical prey abundance affects predator DVM. Higher consumption levels increase the optimal temperatures for growth in fishes. Thus, annual variation in prey abundance should generate corresponding variation in the depths and temperatures selected during predator DVM. In Crater Lake, one of the deepest and most oligotrophic lakes in the world, <jats:italic>Daphnia</jats:italic> zooplankton exhibit cyclical patterns of abundance. We compiled data spanning four distinct pulses of <jats:italic>Daphnia</jats:italic> and analyzed the response of their predator, kokanee salmon (<jats:italic>Oncorhynchus nerka</jats:italic>). Our data spanned 36 yr for <jats:italic>Daphnia</jats:italic> abundance and kokanee body condition, and 24 yr for kokanee DVM (measured by hydroacoustic surveys). Kokanee exhibited four pulses in body weight and condition that corresponded to the four <jats:italic>Daphnia</jats:italic> pulses, suggesting a strong bottom‐up response. Kokanee altered their DVM in years with <jats:italic>Daphnia</jats:italic> by occurring deeper during the day, where <jats:italic>Daphnia</jats:italic> were concentrated, and shallower at night, where temperatures were &gt; 5°C warmer. By selecting warmer habitat in years with <jats:italic>Daphnia</jats:italic>, kokanee increased their estimated overnight digestion by ~ 25%. Understanding how predators alter DVM and other patterns of cyclical habitat use in response to variation in prey abundance has important implications for understanding predator–prey dynamics, which are highly sensitive to prey encounter rates and maximum consumption rates.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"14 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143627458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Daily Sun‐induced chlorophyll fluorescence vs. irradiance curves reflect the photoadaptation of phytoplankton in surface waters","authors":"Yannick Huot, David Antoine, Vincenzo Vellucci","doi":"10.1002/lno.70001","DOIUrl":"https://doi.org/10.1002/lno.70001","url":null,"abstract":"Phytoplankton chlorophyll Sun‐induced fluorescence is observable in the upwelling light field of the ocean. This allows its observation by radiometers in situ or on satellite sensors. Since it is influenced by both biomass and physiology it can potentially provide information about both. Since fluorescence yield is complementary to photosynthesis and heat in photosystem II, its observation throughout the day provides information on the response of phytoplankton to diel light cycles. Here we use a time series collected in the northwestern Mediterranean Sea (BOUSSOLE site) to extract photophysiological parameters of phytoplankton using the Sun‐induced fluorescence and as well as with an active chlorophyll fluorometer. The daily resolved patterns are consistent with photoacclimation and photoadaptation processes and reflect seasonal variations of the mixed‐layer average irradiance. We also show that fluorescence yields derived from satellite measurements (MODIS) at the same location are not correlated to these patterns, confirming the limited influence of photoacclimation and photoadaptation on the satellite‐derived chlorophyll fluorescence yield near solar noon.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"86 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143618453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Responses of microbial communities and greenhouse gas production to land use change in mangrove wetland sediments","authors":"Xianbiao Lin, Bingqian Zhu, Yongyi Peng, Genmei Lin, Dongyao Sun, Wangwang Ye","doi":"10.1002/lno.70028","DOIUrl":"https://doi.org/10.1002/lno.70028","url":null,"abstract":"Tidal wetland reclamation is a worldwide issue that profoundly alters ecological functions and ecosystem service provisions; however, its impacts on sediment microbial communities and functions remain poorly understood. Here, we investigated the spatial and seasonal patterns of greenhouse gas (GHG) production in response to land use change in mangrove wetlands and elucidated the underlying mechanisms by integrating environmental parameters and microbial community characteristics. In the time period studied, land use change substantially reduced the sediment organic matter content, microbial community richness and diversity, and CO<jats:sub>2</jats:sub> production rates. Converting mangroves to drier land cover types, namely orchard and vegetable field, significantly diminished reducing substrates (sulfide, Fe<jats:sup>2+</jats:sup>, and NH<jats:sub>4</jats:sub><jats:sup>+</jats:sup>), microbial network complexity and stability, and CH<jats:sub>4</jats:sub> production rates, while increasing N<jats:sub>2</jats:sub>O production rates. In contrast, these parameters showed the opposite trend following the conversion of mangroves to flooded aquaculture pond. Overall GHG production rate in mangrove wetlands was 399.8 mg CO<jats:sub>2</jats:sub>e kg<jats:sup>−1</jats:sup> d<jats:sup>−1</jats:sup>, which respectively decreased by 68.83%, 69.86%, and 30.84% in orchard, vegetable field, and aquaculture pond. Microbial community richness and network complexity and stability were strongly related to the production rates of CH<jats:sub>4</jats:sub> and N<jats:sub>2</jats:sub>O, rather than CO<jats:sub>2</jats:sub>, which can be better indicators of specialized functions (CH<jats:sub>4</jats:sub> and N<jats:sub>2</jats:sub>O production). Therefore, preserving microbial “interaction” could be important to mitigate the negative effects of microbial community richness and diversity loss caused by human activities in aquatic environments. Future research should consider environmental conditions and microbial community diversity, composition, interactions, and activities to gain a comprehensive understanding of ecosystem functions.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"183 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143618452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Autonomous observations enhance our ability to observe the biological carbon pump across diverse carbon export regimes","authors":"Shawnee Traylor, David P. Nicholson, Samantha J. Clevenger, Ken O. Buesseler, Eric D'Asaro, Craig M. Lee","doi":"10.1002/lno.70002","DOIUrl":"https://doi.org/10.1002/lno.70002","url":null,"abstract":"The expansion of autonomous observation platforms offers vast opportunities for analyzing ocean ecosystems and their role in carbon export. As part of the EXport Processes in the Ocean from RemoTe Sensing campaign, we autonomously measured the productivity regimes in two contrasting end‐member ecosystem states. The first campaign occurred in the subpolar North Pacific near Ocean Station Papa (Site 1), characterized by iron limitation and a highly regenerative regime. The second captured a springtime bloom in the North Atlantic (Site 2), which typically drives efficient export of productivity. Using a combination of floats and gliders carrying biogeochemical sensors, we quantified gross primary productivity, net community production, and organic carbon export potential (<jats:italic>f</jats:italic>C<jats:sub>org</jats:sub>) to assess biological carbon pump strength. Site 2 demonstrated higher cruise‐period productivity, with roughly 5× the gross primary productivity and 13× the euphotic zone net community production seen at Site 1. Greater export efficiency at Site 2 was reflected in numerous indices, such as the ratio of new production to net primary productivity (<jats:italic>ef</jats:italic>‐ratio; Site 1: 0.33; Site 2: 0.73), the ratio of sinking particulate organic carbon to net primary productivity (<jats:italic>ez</jats:italic>‐ratio; Site 1: 0.24; Site 2: 0.69), and mean daily <jats:italic>f</jats:italic>C<jats:sub>org</jats:sub> (Site 1: 3.4 ± 0.7; Site 2: 20.3 ± 2.3 mmol C m<jats:sup>−2</jats:sup> d<jats:sup>−1</jats:sup>). Together with particulate organic carbon flux derived from thorium‐234 measurements, we infer that observed low net community production was almost entirely routed to sinking particulate organic carbon at Site 1, while the much higher net community production at Site 2 resulted in near‐equal proportions routed to dissolved organic carbon production and sinking particulate organic carbon.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"11 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143607807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Global satellite observations of marine phytoplankton pigments over the past two decades","authors":"Deyong Sun, Yuhang Chen, Zhenghao Li, Shengqiang Wang, Peng Chen, Yu Huan","doi":"10.1002/lno.70017","DOIUrl":"https://doi.org/10.1002/lno.70017","url":null,"abstract":"Documenting the variations of phytoplankton pigments is essential for understanding phytoplankton assemblages' dynamics and physiological characteristics in the global oceans. Advanced chlorophyll <jats:italic>a</jats:italic> satellite product has provided an overview of global phytoplankton biomass, yet deeper taxonomic biomass monitoring demands more detailed pigment information. In this study, we have collected 1562 in situ measured sea surface samples (depth &lt; 10 m) from 1997 to 2017 covering the global ocean, where the in situ dataset consists of pigment concentration and phytoplankton absorption coefficient (<jats:italic>a</jats:italic><jats:sub>ph</jats:sub>). A global semi‐analytical pigment model was developed using the Gaussian decomposition method and was evaluated by the leave‐one‐out cross validation method. Model accuracy verification based on in situ measurement (e.g., mean absolute percentage errors below ~ 67% for most pigments) and satellite synchronization dataset (e.g., most pigments have mean absolute percentage errors below ~ 70%) showed the reliable performance of the pigment model in the global oceans. We reconstructed the global hyperspectral phytoplankton absorption by the three‐component absorption model of the phytoplankton size class, enabling satellite application of the pigment model and obtaining the nearly 20‐yr spatiotemporal variations of 14 phytoplankton pigments. Global pigment concentrations exhibited a generally relatively unchanging pattern at the beginning of the 21<jats:sup>st</jats:sup> century, as evidenced by stable geographic distribution and temporal trends, while local environmental disturbances created anomalies in 1‐yr period. Our findings provide an effective model to detect global pigment concentration and essential satellite products for further analysis of phytoplankton assemblages.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"16 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Algal food identity affects morphological anti‐predatory defense in Daphnia pulex","authors":"Carlos Sánchez Arcos, Yannick Hill, Sandra Klintworth, Eric von Elert","doi":"10.1002/lno.70018","DOIUrl":"https://doi.org/10.1002/lno.70018","url":null,"abstract":"Microcrustaceans of the genus <jats:italic>Daphnia</jats:italic> have evolved various inducible anti‐predator defenses; however, it is largely underexplored how the bottom‐up factor food quality may affect the extent of these defenses. A well‐studied example of an inducible defense is the deployment of neckteeth in <jats:italic>Daphnia pulex</jats:italic> in response to infochemicals from predatory larvae of <jats:italic>Chaoborus</jats:italic>, which prey on juvenile instars of <jats:italic>Daphnia</jats:italic>. In general, vulnerability depends on the body size in the respective juvenile <jats:italic>Daphnia</jats:italic> instars in relation to the mouth gape diameter of <jats:italic>Chaoborus</jats:italic> larvae. We hypothesized that algae that prolong the time in which juvenile animals remain in the vulnerable size also increase the predation risk and therefore increase the extent of induced neckteeth. To test this, we supplied three <jats:italic>D. pulex</jats:italic> genotypes with three food algae and quantified somatic growth rates, time in vulnerable instars, and neckteeth in response to <jats:italic>Chaoborus</jats:italic> infochemicals. Food algal identity affected the extent of induced neckteeth by up to 66%. However, this effect was not positively related to the time spent in vulnerable instars, indicating that the time that juveniles remain in a vulnerable size is not used to assess predation risk. We demonstrate that food identity may significantly affect the extent of induced neckteeth in <jats:italic>D. pulex</jats:italic> in a genotype‐dependent way. This strongly suggests that in nature, changing phytoplankton composition may affect the degree of morphological defense and thus constitutes a bottom‐up control of chemical predator–prey communication. This is another example of how environmental factors modulate the temporal dynamics of phenotypic plasticity.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"11 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143599350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carbon production at shallow‐water artificial reef ecosystems relies on water column primary productivity","authors":"Traci Erin Cox, Kelly S. Boyle, Mark A. Albins, Sean P. Powers, Just Cebrian","doi":"10.1002/lno.70008","DOIUrl":"https://doi.org/10.1002/lno.70008","url":null,"abstract":"The attraction‐production continuum in fishery management centers on the extent to which artificial reefs increase fish production or whether they simply redistribute fish. Reef systems could produce carbon to support growth of higher trophic levels. Therefore, we aimed to understand carbon flows at lower trophic levels on shallow‐water (11 m) artificial reefs within a region which hosts an extensive artificial reef network. We described benthic communities and quantified changes in oxygen content within in situ enclosures to assess reef, sediment, and water‐column community metabolism. We tested spatial and temporal differences in metrics by repeatedly sampling at three sites across two seasons for 2 yrs. Suspension feeders were abundant on reef surfaces and these communities were often heterotrophic. In sediments, lancelets, amphipods, and bivalves were scarcer adjacent to the reef (2 m) and more numerous 20 m away. Infauna communities at adjacent reefs were significantly dissimilar, suggesting biotic (e.g., predation) and, or abiotic (e.g., sand scour) conditions cause large differences in infauna communities near reefs. Sediment and water‐column communities were mostly autotrophic and net productivity did not consistently increase or decrease with distance from the reef. Metabolic metrics were often best explained by temporal intervals and site. The integrated system was autotrophic in 9 out of 11 instances where reef, sediment, and water‐column contributed −0.46 to 0.27, −14.8 to 66.8, and 33.5% to 91.4% respectively to net system productivity. When planning artificial reef deployment projects with heterotrophic reefs, managers should ensure ample water‐column space is provisioned to support them trophically.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"8 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143599550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}