Mangroves in arid regions: Ecology, threats, and opportunities

Estuarine Coastal and Shelf Science, Journal Year: 2020, Volume and Issue: 248, P. 106796 - 106796

Published: April 28, 2020

Language: Английский

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Mangrove diversity enhances plant biomass production and carbon storage in Hainan island, China

Functional Ecology, Journal Year: 2021, Volume and Issue: 35(3), P. 774 - 786

Published: Feb. 24, 2021

Abstract Mangrove forests, one of the highest carbon density ecosystems, are very different from other forests as they occupy saline and tidal habitats. Although previous studies in shrublands grasslands have shown a positive effect biodiversity on plant biomass storage, it remains unclear whether this relation to also exists mangrove forests. Here, we evaluate possible effects species diversity, structural characteristics environmental factors production using survey data 234 field plots 30 transects along coastlines Hainan Island, China, during 2017 2018. We found that diversity had effect, not only but soil storage. This was more strongly evident forest communities than either shrub or forest‐shrub mixed communities, with type having biggest Besides, affected by characteristics, namely, increased exponentially tree stem diameter decreased density. Furthermore, observed resource‐dependent mediation ecosystem when linking biomass. The areas high Nitrogen content Mean annual precipitation (MAP) showed higher suggests spatial pattern storage driven both climate fertility (soil N). To our knowledge, is first study based an intensive has verified Our findings suggest greater capacities conservation potential. Thus, crucial for mangroves mitigate greenhouse effect. strengthen understanding services important implications restoration conservation. A free Plain Language Summary can be within Supporting Information article.

Language: Английский

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Processes and mechanisms of coastal woody‐plant mortality

Global Change Biology, Journal Year: 2022, Volume and Issue: 28(20), P. 5881 - 5900

Published: June 11, 2022

Abstract Observations of woody plant mortality in coastal ecosystems are globally widespread, but the overarching processes and underlying mechanisms poorly understood. This knowledge deficiency, combined with rapidly changing water levels, storm surges, atmospheric CO 2 , vapor pressure deficit, creates large predictive uncertainty regarding how will respond to global change. Here, we synthesize literature on that underlie woody‐plant mortality, goal producing a testable hypothesis framework. The key emergent include hypoxic, osmotic, ionic‐driven reductions whole‐plant hydraulic conductance photosynthesis ultimately drive coupled failure carbon starvation. relative importance these driving their order progression, degree coupling depends characteristics anomalous exposure, topographic effects, taxa‐specific variation traits trait acclimation. Greater inundation exposure could accelerate globally; however, interaction elevated drought, rising deficit influence likelihood. Models forests incorporate frequency duration inundation, role climatic drivers, starvation can yield improved estimates inundation‐induced mortality.

Language: Английский

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Global mangrove root production, its controls and roles in the blue carbon budget of mangroves

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(12), P. 3256 - 3270

Published: March 30, 2023

Mangroves are among the most carbon-dense ecosystems worldwide. Most of carbon in mangroves is found belowground, and root production might be an important control accumulation, but has been rarely quantified understood at global scale. Here, we determined mangrove rate its controls using a systematic review recently formalised, spatially explicit typology framework based on geomorphological settings. We that averaged ~770 ± 202 g dry biomass m-2 year-1 globally, which much higher than previously reported close to productive tropical forests. Geomorphological settings exerted marked over together with air temperature precipitation (r2 ≈ 30%, p < .001). Our shows individual changes (e.g. warming, eutrophication, drought) have antagonist effects production, they studied combination. Based this newly established rate, root-derived account for total buried mangroves, 19 Tg C lost each year as CO2 ). Inclusion measurements understudied (i.e. deltas), regions (Indonesia, South America Africa) soil depth (>40 cm), well creation trait database will push forward our understanding cycle now future. Overall, presents comprehensive analysis highlights central role budget.

Language: Английский

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Root productivity contributes to carbon storage and surface elevation adjustments in coastal wetlands

Plant and Soil, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 14, 2025

Language: Английский

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Halophyte adaptations in gray mangrove seedlings to salinity on the Persian Gulf coastline

Frontiers in Forests and Global Change, Journal Year: 2025, Volume and Issue: 8

Published: March 5, 2025

This study aims to explore the salt tolerance mechanisms of Avicennia marina from Persian Gulf, addressing gap in understanding whether mangroves are facultative or obligatory halophytes. Seedlings were exposed freshwater (control), low salinity (25% seawater), medium (50% and high (100% seawater) treatments for six months. The results revealed that promoted optimal growth, with highest values plant height, root shoot biomass, leaf area, seedling vigor (2.86%). non-salinity treatment showed lower (1.96%) greater loss (17.96%). Medium increased nitrogen potassium levels, while elevated chloride sodium content. Photosynthetic pigments higher moderate treatments, catalase activity peaked freshwater, peroxidase both treatments. These findings provide evidence A. Gulf is a halophyte, capable thriving saline non-saline conditions, enhancing its growth health.

Language: Английский

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Modeled approaches to estimating blue carbon accumulation with mangrove restoration to support a blue carbon accounting method for Australia

Limnology and Oceanography, Journal Year: 2022, Volume and Issue: 67(S2)

Published: Jan. 11, 2022

Abstract The development and refinement of methods for estimating organic carbon accumulation in biomass soils during mangrove restoration rehabilitation can encourage uptake projects their ecosystem services, including those climate change mitigation, or blue carbon. To support the a method Australia under Emission Reduction Fund scheme we investigated; (1) whether data from natural mangroves could be used to estimate restoration; (2) modeling accumulation; (3) how modeled achieved over heterogeneous sites. First, assessed soil pools global literature, finding that using provided similar estimates as restored rehabilitated mangroves. We chronosequence studies, which develop regional models with values local Estimating site‐based means stand estimated through use stratified by elevation; reduced overestimates were based on mean values. Modeling environmentally project sites apply approach, stratifying variation site elevation. Our analysis provides strategy an Australian accommodates differences is

Language: Английский

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Foliar water uptake by coastal wetland plants: A novel water acquisition mechanism in arid and humid subtropical mangroves

Journal of Ecology, Journal Year: 2020, Volume and Issue: 108(6), P. 2625 - 2637

Published: April 9, 2020

Abstract Climate change alters freshwater availability in many ecosystems leading to shifts distributions for plants. Despite living exclusively intertidal, saline environments, mangroves rely on non‐saline water maintain plant productivity. However, several mangrove species persist arid environments where from rain and groundwater sources are limited. Under these conditions, foliar uptake fog mist may be an important acquisition strategy. We conducted a field experiment Baja California Sur, Mexico along with controlled chamber (using seedlings sourced humid subtropical region, Florida, USA) show that three co‐occurring, neotropical species, Avicennia germinans , Laguncularia racemosa Rhizophora mangle growing both can access condensed their leaves. Foliar was greatest A. lowest R. possibly reflecting leaf traits associated species‐specific balance strategies. In our misting experiment, the contribution of higher (32 ± 2%) than L. (26 (16 1%). also varied across locations mangle, declining towards species’ northern range limits suggesting distribution patterns arid‐zone affected by spatial variation use. Within use comparable experiments irrespective source population (Baja Sur vs. Florida), is not adaptation, instead used as supplemental strategy mangroves. Synthesis . Our findings indicate have potential atmospheric water, such rain, dew sea fog, through leaves offset soil deficits. Variation influence pseudo‐drought (highly saline) implications response climate change.

Language: Английский

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Tidal Pumping Controls Dissolved Organic Matter Properties and Outwelling From Mangrove Groundwater to Coastal Water

Water Resources Research, Journal Year: 2023, Volume and Issue: 59(3)

Published: March 1, 2023

Abstract Dissolved organic matter (DOM) in highly productive intertidal mangroves is an important carbon and nutrient source to the coastal ocean. In dynamic mangrove systems, both tidal pumping or geochemical factors can control DOM characteristics. The influence of groundwater flow on properties fluxes remains poorly understood. Here, we compared concentrations, sources, spectroscopic characteristics across a recharge‐discharge gradient. We used three‐dimensional array sampling strategy reduce spatial biases, monitoring quantify tidally driven exchange, spectrofluoroscopy fluorescent components. results showed that hydrology played key role driving horizontal (i.e., from sea) vertical directions. Due high heterogeneity dissolved inorganic (DIC) (DOC) concentrations groundwater, outwelling degree variability at scale (54.8–234.8 μmol m −2 d −1 for DIC 2.5–12.4 DOC). contribution terrestrial gradually decreased toward ocean, but microbial contributions recently produced autochthonous increased. Deep received less experienced anaerobic mineralization, resulting lower than shallow groundwater. Greater variations were found deep Overall, surface water‐groundwater interactions how contributes budgets sequestration

Language: Английский

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Salinity‐induced limits to mangrove canopy height

Global Ecology and Biogeography, Journal Year: 2023, Volume and Issue: 32(9), P. 1561 - 1574

Published: June 21, 2023

Abstract Aim Mangrove canopy height is a key metric to assess tidal forests' resilience in the face of climate change. In terrestrial forests, tree primarily determined by water availability, plant hydraulic design, and disturbance regime. However, role stress remains elusive environments, where saturated soils are prevalent, salinity can substantially affect soil potential. Location Global. Time Period The dataset provides global snapshot maximum mangrove geographical distribution for year 2000. Climate environmental variables extend over period 1970–2018. Major Taxa Studied Mangroves. Methods We use observations height, species richness, air temperature, seawater salinity—a proxy salt concentration—to explore causal link between stature. Results Our findings suggest that limits height. High favours more salt‐tolerant species, narrowing spectrum viable traits. Highly mangroves have evolved cope with high concentrations soil, but this adaptation comes at cost. They typically lower rates photosynthesis growth, resulting reduced productivity smaller stature compared salt‐sensitive species. This suggests salinity, biodiversity, selects tend be less productive shorter. Conclusions hypothesize salinity‐induced limit direct result reduction primary productivity, an increment risk xylem cavitation, indirect consequence decrease biodiversity. As sea‐level rise enhances coastal salinisation, failure account these effects lead incorrect estimates future carbon stocks Tropical ecosystems endanger preservation efforts.

Language: Английский

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