The effects of forest management on water quality

Forest Ecology and Management, Год журнала: 2022, Номер 522, С. 120397 - 120397

Опубликована: Авг. 22, 2022

Язык: Английский

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Contribution of karst ecological restoration engineering to vegetation greening in southwest China during recent decade

Ecological Indicators, Год журнала: 2020, Номер 121, С. 107081 - 107081

Опубликована: Окт. 26, 2020

General greening in vegetation, especially southwest China, has been observed globally recent decade. However, temporal-spatial variation patterns and potential causes of vegetation are not well understood China. Here, we used data the normalized difference index (NDVI) climate, land use cover, geology, ecological afforestation karst rocky desertification to analyze coverage its response climate change human-induced factors China between 2000 2016. A general trend with significant differences patterns, was from 2016, area 2006 2016 increased by 4.68% relative level 2005. The proportion higher regions (6.95%), limestone region (8.00%), than nonkarst (3.82%). Of all trends, 65% associated factors, 35% resulted After implementation restoration engineering, contribution 77% although experienced a serve drought during that time. These results highlight engineering projects can reduce risks ecosystem sensitivity perturbations.

Язык: Английский

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Cleaner air reveals growing influence of climate on dissolved organic carbon trends in northern headwaters

Environmental Research Letters, Год журнала: 2021, Номер 16(10), С. 104009 - 104009

Опубликована: Сен. 9, 2021

Surface water browning, the result of increasing concentrations dissolved organic matter (DOM), has been widespread in northern ecosystems recent decades. Here, we assess a database 426 undisturbed headwater lakes and streams Europe North America for evidence trends DOM between 1990 2016. We describe contrasting changes (decelerating) (accelerating), which are consistent with solubility responses to declines sulfate deposition. While earlier (1990-2004) were almost entirely related atmospheric chemistry, climatic chemical drivers equally important explaining (2002-2016). estimate that riverine export from increased by 27% during study period. Increased summer precipitation strengthened upward carbon while warming apparently damped browning. Our results suggest strong but changing influences air quality climate on terrestrial cycle, magnitude land water.

Язык: Английский

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Ecology and extent of freshwater browning - What we know and what should be studied next in the context of global change

The Science of The Total Environment, Год журнала: 2021, Номер 812, С. 152420 - 152420

Опубликована: Дек. 22, 2021

Water browning or brownification refers to increasing water color, often related dissolved organic matter (DOM) and carbon (DOC) content in freshwaters. Browning has been recognized as a significant physicochemical phenomenon altering boreal lakes, but our understanding of its ecological consequences different freshwater habitats regions is limited. Here, we review the on habitats, food webs aquatic-terrestrial habitat coupling. We examine global trends DOM/DOC, use remote sensing tool investigate from local scales. Studies have focused lakes rivers while seldom addressing effects at catchment scale. Other such small temporary waterbodies overlooked, making study entire network incomplete. While past research investigated response primary producers, aquatic invertebrates fishes, macrophytes, invasive species, understudied. Research without considering fluxes between terrestrial habitats. highlight importance how changes one may cascade another. broader than heretofore concentration region. Overall, propose that future studies improve through following actions: 1) knowledge processes other wetland types rivers, 2) assessing impact multiple scales, 3) examining coupling, 4) expanding scale, 5) using consequences.

Язык: Английский

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Landscape controls on riverine export of dissolved organic carbon from Great Britain

Biogeochemistry, Год журнала: 2021, Номер 164(1), С. 163 - 184

Опубликована: Фев. 16, 2021

Abstract The dissolved organic carbon (DOC) export from land to ocean via rivers is a significant term in the global C cycle, and has been modified many areas by human activity. DOC exports large are fairly well quantified, but those smaller river systems, including draining oceanic regions, generally under-represented syntheses. Given that these regions typically have high runoff peat cover, they may exert disproportionate influence on land–ocean export. Here we describe comprehensive new assessment of annual riverine estuaries across island Great Britain (GB), which spans latitude range 50–60° N with strong spatial gradients topography, soils, rainfall, use population density. yields (export per unit area) were positively related best predicted extent forest relatively insensitive density or agricultural development. Based an empirical relationship rainfall estimate GB area freshwater-seawater interface was 1.15 Tg year −1 2017. average yield for 5.04 g m −2 , higher than most world’s major rivers, humid tropics Arctic, supporting conclusion under-representation systems peat-rich could lead under-estimation main anthropogenic factor influencing distribution appears be upland conifer plantation forestry, estimated raised overall 0.168 . This equivalent 15% current rate net CO 2 uptake British forests. With UK other countries seeking expand cover climate change mitigation, this ‘leak ecosystem’ should incorporated future assessments sequestration potential planting strategies.

Язык: Английский

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Peatland drainage - a missing link behind increasing TOC concentrations in waters from high latitude forest catchments?

The Science of The Total Environment, Год журнала: 2021, Номер 774, С. 145150 - 145150

Опубликована: Фев. 6, 2021

Total Organic Carbon (TOC) concentrations in stream waters from peat-covered catchments have increased over the last 15–25 years, resulting large-scale brownification of lakes and rivers high latitudes. While this increase has primarily been attributed to decreased acid deposition climatic warming most regions, we studied whether peatland drainage forested contributed increasing TOC concentrations. We analysed spatial variability average a total 133 dominated Sweden Finland, which 62 were pristine 71 drained during century. In addition, performed trend analysis on 37 for long-term data available. found about 14 mg l−1 higher streams discharging than undrained sites southern latitudes, 8 northern Trend did not indicate significant differences concentration trends between but indicated that tree stand volume correlated with trends. This supports earlier findings general forest cover biomass occurred latitudes decades is another factor brownification.

Язык: Английский

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A review of long-term change in surface water natural organic matter concentration in the northern hemisphere and the implications for drinking water treatment

The Science of The Total Environment, Год журнала: 2022, Номер 858, С. 159699 - 159699

Опубликована: Окт. 26, 2022

Reduced atmospheric acid deposition has given rise to recovery from acidification – defined as increasing pH, neutralization capacity (ANC), or alkalinity in surface waters. Strong evidence of been reported across North America and Europe, driving chemical responses. The primary responses identified this review were concentration changing character natural organic matter (NOM) towards predominantly hydrophobic nature. NOM also influenced trace metal cycling many browning waters increases Fe Al. Further, climate change other factors (e.g., land use) act concert with reductions contribute widespread will have a more pronounced effect stabilizes. observed water quality trends presented challenges for drinking treatment increased dosing, poor filter operations, formation disinfection by-products) facilities may be under designed result. This comprehensive key research areas addressed, including 1) need monitoring programs larger timescales; consistency measurements) assess impacts on dynamics, 2) better understanding vulnerabilities the transition robust technologies solutions that can adapt drivers quality.

Язык: Английский

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Reviewing peatland forestry: Implications and mitigation measures for freshwater ecosystem browning

Forest Ecology and Management, Год журнала: 2023, Номер 531, С. 120776 - 120776

Опубликована: Янв. 13, 2023

Freshwaters of the boreal and temperate regions have experienced increased browning during last decades. Browning, or brownification, is mostly driven by organic carbon (OC) iron concentrations. It can cause detrimental changes in aquatic ecosystems through effects on chemistry, physics ecology. Additionally, impact greenhouse gas emissions, increase costs drinking water treatment weaken recreational value bodies. All these impacts call for means to mitigate excess export humic matter ecosystems. Browning has often been associated with decreased atmospheric sulphur deposition climate change-induced alterations temperature, vegetation hydrological regime catchments. Lately, it attributed land use, especially drainage peatlands forestry purposes afforestation. In this review, we evaluate peatland operations OC leaching assess possible mitigation measures. We reveal that traditional, even-aged forest management clear felling, site preparation ditch cleaning creates hot spots moments carbon-rich runoff due fluctuations hydrology, peat decomposition exposure. Simultaneously, most current protection measures are either ineffective ambiguous retaining OC, a dissolved form. Hence, practices prevent future reduce connectivity essential negative quality impacts. conclude systemic change would be needed formation loading leaching. More research needed, but seems transition towards more natural diverse abundantly applied continuous cover forestry, mixed improved catchment retention restoration could result fewer undesirable Protecting biodiversity counteracting requires integration updated into policies guidelines, as green shift bioeconomy will create an increasing demand sustainable use forests.

Язык: Английский

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Climate-driven deoxygenation of northern lakes

Nature Climate Change, Год журнала: 2024, Номер 14(8), С. 832 - 838

Опубликована: Июль 1, 2024

Abstract Oxygen depletion constitutes a major threat to lake ecosystems and the services they provide. Most of world’s lakes are located >45° N, where accelerated climate warming elevated carbon loads might severely increase risk hypoxia, but this has not been systematically examined. Here analysis 2.6 million water quality observations from 8,288 shows that between 1960 2022, most northern experienced rapid deoxygenation strongly linked climate-driven prolongation summer stratification. levels deteriorated in small (<10 ha) owing their greater volumetric oxygen demand surface rates, while largest gained under minimal stratification changes improved aeration at spring overturns. Seasonal consumption rates declined, despite widespread browning. Proliferating anoxia enhanced seasonal internal loading C, P N depleted long-term, indicating can exhaust redox-sensitive fractions sediment nutrient reservoirs.

Язык: Английский

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Negative effect of turbidity on prey capture for both visual and non‐visual aquatic predators

Journal of Animal Ecology, Год журнала: 2020, Номер 89(11), С. 2427 - 2439

Опубликована: Авг. 29, 2020

Abstract Turbidity plays an important role in aquatic predator–prey interactions. Increases turbidity are expected to reduce prey capture rates, especially for visually oriented predators. However, there is also evidence indicating that may have little or no effect on predation rates. Here, we conducted a systematic review and meta‐analysis of the relationship between rate. We explored possible sources heterogeneity sizes (capture strategy, predator's body size, relative eye size range experiments) while controlling dependence among effects phylogenetic relationships predator species. found consistent negative (manipulated was main factor accounting between‐study variation sizes. Also, rates both non‐visually predators decreased with increase turbidity. In addition, fish predators, did not influence Despite paucity studies some groups (mainly tropical regions), provide corroborative critical environmental This result relevant considering changes human‐induced pervasive alteration resulted from, other mechanisms, runoff after deforestation, eutrophication oligotrophication reservoir cascades, which imply

Язык: Английский

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