Development and application of a new mangrove vegetation index (MVI) for rapid and accurate mangrove mapping

ISPRS Journal of Photogrammetry and Remote Sensing, Journal Year: 2020, Volume and Issue: 166, P. 95 - 117

Published: June 11, 2020

Language: Английский

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Climate and plant controls on soil organic matter in coastal wetlands

Global Change Biology, Journal Year: 2018, Volume and Issue: 24(11), P. 5361 - 5379

Published: June 29, 2018

Coastal wetlands are among the most productive and carbon-rich ecosystems on Earth. Long-term carbon storage in coastal occurs primarily belowground as soil organic matter (SOM). In addition to serving a sink, SOM influences wetland ecosystem structure, function, stability. To anticipate mitigate effects of climate change, there is need advance understanding environmental controls SOM. Here, we investigated influence four formation factors: climate, biota, parent materials, topography. Along northern Gulf Mexico, collected plant data across elevation zonation gradients within 10 estuaries that span broad temperature precipitation gradients. Our results highlight importance climate-plant indicate scale location dependent. plants sensitive change; small changes or can transform communities. Across region, was greatest mangrove forests salt marshes dominated by graminoid plants. lower flats lacked vascular succulent We quantified strong relationships between precipitation, salinity, productivity, Low leads high which limits productivity appears constrain accumulation. analyses use from but our be related globe provide foundation for predicting ecological future reductions freshwater availability. many services dependent highly vulnerable change. Collectively, regulated cascading availability could impact stability affect supply some services.

Language: Английский

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Linking water relations and hydraulics with photosynthesis

The Plant Journal, Journal Year: 2019, Volume and Issue: 101(4), P. 800 - 815

Published: Nov. 2, 2019

For land plants, water is the principal governor of growth. Photosynthetic performance highly dependent on stable and suitable status leaves, which balanced by transport capacity, loss rate as well capacitance plant. This review discusses links between leaf photosynthesis, specifically focussing coordination CO2 within potential role elasticity transport.

Language: Английский

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Engineering Drought Resistance in Forest Trees

Frontiers in Plant Science, Journal Year: 2019, Volume and Issue: 9

Published: Jan. 8, 2019

Climatic stresses limit plant growth and productivity. In the past decade, tree improvement programs were mainly focused on yield but it is obvious that enhanced stress resistance also required. this review we highlight important drought avoidance tolerance mechanisms in forest trees. Genomes of economically trees species with divergent can now be exploited to uncover mechanistic basis long-term adaptation at whole level. Molecular physiology indicates osmotic adjustment, antioxidative defense increased water use efficiency are targets for cellular tissue Recent biotechnological approaches overexpression genes involved sensing signaling, such as abscisic acid core pathway down-stream transcription factors. By strategy, a suite systems was recruited, generally enhancing salt under laboratory conditions. However, field studies still scarce. Under conditions exposed combinations vary duration magnitude. Variable may overrule positive effect achieved by engineering an individual pathway. To assess usability distinct modifications, large-scale experimental different environments necessary. optimize balance between defense, stress-inducible promoters useful. Future will benefit from better understanding intricate networks ameliorate molecular ecological traits

Language: Английский

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Linear and nonlinear effects of temperature and precipitation on ecosystem properties in tidal saline wetlands

Ecosphere, Journal Year: 2017, Volume and Issue: 8(10)

Published: Oct. 1, 2017

Abstract Climate greatly influences the structure and functioning of tidal saline wetland ecosystems. However, there is a need to better quantify effects climatic drivers on ecosystem properties, particularly near climate‐sensitive ecological transition zones. Here, we used climate‐ literature‐derived data from wetlands test hypotheses regarding influence (i.e., temperature precipitation regimes) following six properties: canopy height, biomass, productivity, decomposition, soil carbon density, accumulation. Our analyses elucidate linear nonlinear drivers. We quantified positive relationships between above‐ground productivity strong (sigmoidal) (1) biomass height (2) height. Near temperature‐controlled mangrove range limits, small changes in are expected trigger comparatively large as forests grow, expand, and, some cases, replace salt marshes. within these same zones, temperature‐induced be small. Interestingly, despite significant across tropical–temperate mangrove–marsh zone, density or accumulation were not significant. literature review identifies several properties many regions world for which insufficient fully evaluate drivers, identified gaps can by scientists guide future research. indicate that precipitation‐controlled scant other properties. There more decomposition gradients, advance understanding freshwater availability, additional needed arid climates. Collectively, our results help managers anticipate consequences climate change coastal wetlands.

Language: Английский

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Biochemical and multi-omics analyses of response mechanisms of rhizobacteria to long-term copper and salt stress: Effect on soil physicochemical properties and growth of Avicennia marina

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 466, P. 133601 - 133601

Published: Jan. 24, 2024

Language: Английский

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Divergence of vessel diameter explains interspecific variation in hydraulic safety to salinity in the Sundarbans mangrove ecosystem

Functional Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 28, 2025

Abstract Despite their crucial role in providing ecosystem services and livelihood support 124 countries, mangroves are facing challenges from warming, altered seasonal precipitation sea level rise (SLR) the face of climate change. Variation intra‐ interspecific hydraulic traits related xylem anatomy may allow trees to adapt changing environmental conditions, yet little is known about adaptive plasticity mangroves. We examined (i) trait variation across three (low, medium high) salinity zones widespread mangrove species ( Exocecaria agallocha , Xylocarpus moluccensis Heritiera fomes ) with distinct shade tolerance characteristics Bangladesh Sundarbans, (ii) associations traits, (iii) habitat (regulator, resource forest structure) effects on vessel diameter due its strong influence conductivity variation. Although potential (K P leaf‐specific L showed species‐specific variation, a notably greater was found low‐salinity zone (LSZ), which had lower wall reinforcement (t/b) 2 . Xylem exhibited mostly phylogenetic signals, whereas pairwise relationships between were phylogenetically independent. The study characteristics, where D strongly K Furthermore, weak trade‐off efficiency safety. A percentage smaller diameters light‐demanding E. indicates safety against cavitation under stressful conditions than shade‐tolerant H. followed by X. place broad bounds combined salinity, nutrient availability tree size modulate diameter, leads contrasting terms suggests an important adaptation distribution. results also provide insight into salinity‐induced growth reduction mortality Read free Plain Language Summary for this article Journal blog.

Language: Английский

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The importance of tree internal water storage under drought conditions

Tree Physiology, Journal Year: 2021, Volume and Issue: 42(4), P. 771 - 783

Published: Oct. 30, 2021

Global warming and drying trends, as well the increase in frequency intensity of droughts, may have unprecedented impacts on various forest ecosystems. We assessed role internal water storage (WS) drought resistance mature pine trees semi-arid Yatir Forest. Transpiration (T), soil moisture sap flow (SF) were measured continuously, accompanied by periodical measurements leaf branch potential (Ψleaf) content (WC). The data used to parameterize a tree hydraulics model examine impact WS capacitance relations. results continuous showed 5-h time lag between T SF dry season, which peaked early morning afternoon, respectively. A good fit observations was only obtained when empirically estimated included model. Without during Ψleaf would drop below threshold known cause hydraulic failure cessation gas exchange studied species. Our indicate that is key trait could enhance survival climate, contributing up 45% total daily transpiration season.

Language: Английский

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Effects of Extreme Salinity Stress on a Temperate Mangrove Ecosystem

Frontiers in Forests and Global Change, Journal Year: 2022, Volume and Issue: 5

Published: May 24, 2022

Mangrove forests provide essential ecosystem services, but are threatened by habitat loss, effects of climatic change and chemical pollutants. Hypersalinity can also lead to mangrove mortality, although mangroves adapted saline habitats. A recent dieback event >9 ha temperate ( Avicennia marina ) in South Australia allowed evaluate the generality anthropogenic impacts on ecosystems. We carried out multidisciplinary investigations, combining airborne remote sensing with on-ground measurements detect extent impact. The forest was differentiated into “healthy,” “stressed,” “dead” zones using LIDAR, RGB hyperspectral imagery. Differences characteristics trees soils were tested between these zones. Porewater salinities >100 measured areas where occurred, hypersalinity persisted a year after event, making it one most extreme cases known mangrove. Sediments zone anaerobic contained higher concentrations sulfate chloride. CO 2 efflux from sediment as well carbon stocks biomass soil did not differ event. photosynthetic traits physiological indicated that health impacted beyond immediate zone. Normalized Difference Vegetation Index (NDVI), rate, stomatal conductance transpiration rate chlorophyll fluorescence lower “stressed” than “healthy” Leaves less nitrogen phosphorous leaves zone, had arsenic, sulfur zinc concentrations. response semi-arid similar sub-/tropical climates already at their tolerance limit, which places them more risk regardless latitude. findings have relevance for understanding disturbance mangrove, added significance climate regions could expand global warming.

Language: Английский

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The overlooked functions of trichomes: Water absorption and metal detoxication

Plant Cell & Environment, Journal Year: 2022, Volume and Issue: 46(3), P. 669 - 687

Published: Dec. 30, 2022

Abstract Trichomes are epidermal outgrowths on plant shoots. Their roles in protecting plants against herbivores and the biosynthesis of specialized metabolites have long been recognized. Recently, studies increasingly showing that trichomes also play important water absorption metal detoxication, with these having implications for ecology, environment, agriculture. However, two functions largely overlooked much remains unknown. In this review, we show 37 species belonging to 14 families involved absorption, while 33 from 13 capable sequestering metals within their trichomes. The ability absorb results decreased hydrophobicity compared remainder leaf surface as well presence special structures collecting absorbing water. contrast, detoxication function not only good connection basal cells underlying vascular tissues, but metal‐chelating ligands transporters themselves. Knowledge gaps critical future research questions regarding trichome highlighted. This review improves our understanding

Language: Английский

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