Mangrove reforestation provides greater blue carbon benefit than afforestation for mitigating global climate change

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Фев. 10, 2023

Significant efforts have been invested to restore mangrove forests worldwide through reforestation and afforestation. However, blue carbon benefit has not compared between these two silvicultural pathways at the global scale. Here, we integrated results from direct field measurements of over 370 restoration sites around world show that (reestablishing mangroves where they previously colonized) had a greater storage potential per hectare than afforestation (establishing mangrove). Greater accumulation was mainly attributed favorable intertidal positioning, higher nitrogen availability, lower salinity most sites. Reforestation all physically feasible areas in deforested regions could promote uptake 671.5-688.8 Tg CO2-eq globally 40-year period, 60% more afforesting same area on tidal flats (more marginal sites). Along with avoiding conflicts habitat conversion, should be given priority when designing nature-based solutions for mitigating climate change.

Язык: Английский

---

Ecological restoration of coastal wetlands in China: Current status and suggestions

Biological Conservation, Год журнала: 2024, Номер 291, С. 110513 - 110513

Опубликована: Фев. 29, 2024

Язык: Английский

---

It's time to broaden what we consider a ‘blue carbon ecosystem’

Global Change Biology, Год журнала: 2024, Номер 30(5)

Опубликована: Май 1, 2024

Abstract Photoautotrophic marine ecosystems can lock up organic carbon in their biomass and the associated sediments they trap over millennia are thus regarded as blue ecosystems. Because of ability to for millennia, is receiving much attention within United Nations' 2030 Agenda Sustainable Development a nature‐based solution (NBS) climate change, but classically still focuses on seagrass meadows, mangrove forests, tidal marshes. However, other coastal could also be important storage, remain largely neglected both cycling budgets NBS strategic planning. Using meta‐analysis 253 research publications, we identify ecosystems—including mud flats, fjords, coralline algal (rhodolith) beds, some components or coral reef systems—with strong capacity act sinks certain situations. Features that promote burial these ‘non‐classical’ included: (1) balancing release by calcification via uptake at individual ecosystem levels; (2) high rates allochthonous supply because particle trapping capacity; (3) preservation low remineralization rates; (4) location depositional environments. Some features context‐dependent, meaning were locations, not others. Therefore, provide universal framework evaluate likelihood given behave sink context. Overall, this paper seeks encourage consideration non‐classical strategies, allowing more complete accounting.

Язык: Английский

---

Achievements, challenges, and recommendations for waterbird conservation in China's coastal wetlands

Avian Research, Год журнала: 2023, Номер 14, С. 100123 - 100123

Опубликована: Янв. 1, 2023

China's coastal wetlands provide breeding, migration stopover, and wintering habitats for about 230 waterbird species, which is more than a quarter of all waterbirds in the world. Large-scale high intensity human activities have resulted serious loss degradation over past half century, causing population declines many waterbirds. Through literature review expert surveys, this article reviews conservation measures taken recent decades to conserve provides recommendations future action from three aspects: policy administration, habitat management, multiparty participation. Over decades, legislation, regulations plans at national level site-specific interventions been implemented, with notable improvement effectiveness making multi-stakeholder Accordingly, some threats mitigated key sites designated as strictly protected nature reserves. However, critical issues still remain, mostly related such wetland restoration, control invasive Spartina alterniflora, environmental pollution, artificial quality. We highlight that protecting natural tidal improving quality are waterbirds, especially those highly dependent on intertidal wetlands. China has demonstrated strong commitment ecological restoration future, terms both funding policies biodiversity ecosystems. It important supported continuously by science- evidence-based decisions actions.

Язык: Английский

---

Shorebird droppings analysis: Microplastics and heavy metals in a key conservation reserve and adjoining sand beaches in the west coast of India

Marine Pollution Bulletin, Год журнала: 2024, Номер 207, С. 116929 - 116929

Опубликована: Сен. 4, 2024

Язык: Английский

---

An emerging coastal wetland management dilemma between mangrove expansion and shorebird conservation

Conservation Biology, Год журнала: 2022, Номер 36(5)

Опубликована: Фев. 25, 2022

Abstract Coastal wetlands around the world have been degraded by human activities. Global declines in extent of important coastal wetlands, including mangroves, salt marshes, and tidal flats, necessitate mitigation restoration efforts. However, some well‐meaning management actions, particularly mangrove afforestation, can inadvertently cause further loss degradation other habitats if these actions are not planned carefully. In particular, there is a potential conflict between shorebird conservation because afforestation may occur at expense bare which form main foraging for threatened shorebirds support organisms. We examined several case studies that illustrate trade‐off flat maintenance. To investigate whether examples reflect an emerging broad‐scale problem, we used satellite imagery to quantify change habitat 22 areas mainland China from 2000 2015.The across all sites declined significantly ( p < 0.01, n = 22) while among with mangroves present, expanded 14). Our results suggest expansion considerably reduced 8 sites. improve overall outcome, devised decision tree addressing dilemma. Important factors consider include area interest importance what impacts are; value proposed ecosystem compared existing ecosystem; conflict‐resolution process will be needed choices very similar. With careful consideration alternative strategies, makers ensure does imperil migratory shorebirds.

Язык: Английский

---

Shorebird habitat selection and foraging behaviour have important implications for management at an internationally important non‐breeding wetland

Ecological Solutions and Evidence, Год журнала: 2024, Номер 5(1)

Опубликована: Янв. 1, 2024

Abstract It is imperative to manage wetlands appropriately in the non‐breeding range of migratory shorebirds because their habitat quality impacts survival and reproductive performance. However, it challenging measure relate these parameters individual sites they are influenced by a composite contribution fitness across all used annual cycle. Identifying important features for shorebirds, assessing whether management actions aimed at improving effective, poses substantial challenge. Nonetheless, within site, shorebird subsite selection foraging behaviour could reveal variation proxies suitability. We developed field study investigate Coorong, an internationally site Australia. examined abundance among multiple subsites wetland relation variables (potential area, salinity, prey density, wind, temperature), first three which can be management. Larger potential defined as combined area bare mud/sand shallow water (<20 cm depth), was associated with higher same shore length, suggesting this most feature selection. Shorebird step rate, reflects effort catching prey, lower density. This suggests that rate indicator availability. Potential strongly positively correlated abundance. At where levels managed, flows should regulated so not too high (limiting area) or low (drying out mudflats). critical large areas attract productive do become ecological traps. Management aim maintain healthy on attractive while also minimising predation disturbance shorebirds. Monitoring directly challenging, but our shows provides low‐cost relative macroinvertebrate

Язык: Английский

---

The effect of Spartina alterniflora eradication on waterbirds and benthic organisms

Restoration Ecology, Год журнала: 2023, Номер 31(8)

Опубликована: Окт. 10, 2023

There has been an increasing number of coastal restoration projects to eradicate Smooth cordgrass ( Spartina alterniflora ) and restore bare tidal flats conserve waterbirds. However, the evidence for assumed benefits waterbirds benthic organisms after such efforts remains limited. We evaluated impact S. eradication on in southern China. deployed time‐lapse cameras satellite trackers quantify compare occurrence frequency habitat use birds different habitats. compared density biomass collected areas where had eradicated. found that almost all waterbirds, except gulls, avoided was present. Once eradicated, species richness species‐level diversity shorebirds did not differ significantly from those flats. At least 9 out 14 tracked individual used with Common Redshank Tringa totanus demonstrating a clear preference habitat. The benthos deeper sediments (5–20 cm below surface) were lower eradicated than flats, indicating food resources may take longer 1 year recover. This research demonstrates is important waterbird habitats, should be made are

Язык: Английский

---

A bibliometric analysis of blue carbon (1993–2023): evolution of research hot topics and trends

Frontiers in Marine Science, Год журнала: 2024, Номер 11

Опубликована: Авг. 30, 2024

Blue carbon refers to the fixed in marine ecosystems such as mangroves, salt marshes, and seagrass beds. Considered a treasure house for capturing storing dioxide, it can alleviate environmental issues linked climate change positively influence environments where people live. Thus, clarify hotspots development trends of blue research, bibliometric analysis incorporating ScientoPy VOSviewer software were used quantitatively analyze 4,604 publications from Web Science Scopus databases between 1993 2023. The results indicate rapidly growing number published studies on carbon, with research being multifaceted gradually becoming an interdisciplinary international topic. This study which is based keyword clustering analysis, comprises three stages. strength cooperative connections scholars various countries who have work carbon. found that cooperation networks developed are strong those developing relatively weak. Quantitative trend reveals focus restoration conservation ecosystems, remote sensing predominant technology field recent years. In increasing sequestration capacity, mitigation, macroalgae remain potential development.

Язык: Английский

---

Remote Sensing of Coastal Wetland Degradation Using the Landscape Directional Succession Model

Remote Sensing, Год журнала: 2022, Номер 14(20), С. 5273 - 5273

Опубликована: Окт. 21, 2022

In recent decades, human activities have impaired the structure, function, and diversity of coastal wetland ecosystems, there is a need for rational planning ecological restoration to curb degradation. However, challenge remains quickly accurately identify degraded areas their degradation levels. this study, we used remote sensing interpretation data from 1980 2020 evaluation method based on landscape directional succession model quantify spatial temporal characteristics in Jiangsu Province, China. The key findings showed that 3020.67 km2 wetlands became over 40 years accounting 42.74% total area wetlands, overall was mild. This presented significant differences, with Yancheng City observed be more serious than Nantong City. Degradation mainly occurred Sheyang County, Dafeng District, Dongtai City, Rudong distribution pattern severe moderate degradation, mild non-degradation land sea order. obvious stages, study increasing trend. comprehensive score (1.67) 3.70 times 1985 (0.45), turning point 2000. types were dominated by transformation natural into construction (coastal industry), fish farming, arable land, as well invasion exotic species. Although great efforts been made protect restore development utilization resources should strictly controlled achieve goal sustainable areas.

Язык: Английский

---