Evaluation of plateau wetland ecological security and its influencing factors in multi-climatic zones: A case study of Yunnan Province

Research Square (Research Square), Год журнала: 2023, Номер unknown

Опубликована: Авг. 14, 2023

Abstract Plateau wetlands play an important role in social and economic development ecological security. The environment of a plateau wetland is fragile vulnerable to external interference, resulting changes the structure functions. Ecological security assessment key fully understanding their situation. Yunnan Province, which located Qinghai-Tibet Plateau, has significant stereoscopic climate, characterized by distinct features diverse complex wetlands. Thus, studying Province spanning various climatic zones great significance. In this study, improved pressure-state-response model was constructed, index system containing state pressure established using remote sensing data, Yearbook socioeconomic statistical data. Taking 16 prefectures as samples, study weighted evaluation indices via combination entropy weighting expert weighting. addition, 2017 evaluated fuzzy matter-element method, influencing factors were analyzed. Results showed that highest distributed Nujiang, Diqing northwest Xishuangbanna south, whereas lowest area Qujing, Zhaotong northeast Baoshan west. Differences observed different prefectures. general, annual average temperature, proportion natural wetland, percentage secondary industry, precipitation, service function per unit acreage, fertilization intensity, industrial water recycling rate. results grey correlation analysis human disturbance activities main influence rate two close each other. findings work could provide suggestions for decision making on across multi-climate zones, well data support protection

Язык: Английский

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Approaches, potential, and challenges in the use of remote sensing to study mangrove and other tropical wetland forests

Botanical Sciences, Год журнала: 2023, Номер 102(1), С. 1 - 25

Опубликована: Ноя. 6, 2023

Tropical wetland forests are fragile ecosystems facing critical risks due to global warming and other anthropogenic threats. Hence, gathering accurate reliable information on them is urgent. Although remote sensing has demonstrated great potential in studying terrestrial ecosystems, sensing-based forest research still an early stage of development. Mapping forests, particularly mangrove was initial goal this approach a task that faces methodological challenges. Initially based aerial photography only, mapping through underwent explosive diversification after the launching artificial satellites 1970s. Later, precision increased with combination hyperspectral, multispectral, high very resolution imagery. Accurate delimitation extent also necessary assess their temporal dynamics (losses, gains, horizontal displacement). Despite prevalence studies, current addresses new questions novel aims, such as describing predicting attributes mathematical modeling. made substantial progress recent decades, modeling remain insufficiently explored fields research. Combining active passive sensors promising alternative provide more picture these communities’ attributes. In particular, LiDAR radar-based technologies may help overcome difficulties encountered older studies. future, we will witness conceptual enable us surmount remaining

Язык: Английский

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Análise de tendência de mudanças na qualidade da água da sub-bacia do Rio Beberibe-PE

Journal of Hyperspectral Remote Sensing, Год журнала: 2023, Номер 13(3), С. 348 - 360

Опубликована: Дек. 30, 2023

O presente estudo investigou a qualidade da água ao longo do Rio Beberibe, na bacia pernambucana Metropolitana Norte. Com extensão de 23,27 km e área drenagem 79 km², o rio atravessa os municípios Camaragibe, Recife, Paulista Olinda, atendendo uma população 2.288.834 habitantes. Foram analisados parâmetros Oxigênio Dissolvido (OD), Fósforo Total (P), Amônia (NH3) Demanda Bioquímica (DBO) 1 ano, visando compreender as tendências impactos das atividades humanas nas águas fluviais. Os resultados indicaram que há variação espacial temporal água, com diferentes comportamentos dos rio. Observou-se tendência aumento OD em todos pontos monitorados, enquanto para DBO, NH3 P, algumas estações apresentaram e, outras não evidenciaram claras. A análise uso ocupação solo indicou houve redução áreas agrícolas urbanas anos. cabeceira Beberibe mostraram menor alteração mais próximos à foz foram impactados, possivelmente devido maior densidade populacional inadequada infraestrutura saneamento no local. destacam importância ações efetivas preservação melhoria nesse cenário crescente urbanização pressões humanas. As conclusões deste podem orientar estratégias gestão tomada decisões voltadas sustentabilidade recursos hídricos região.

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