Abstract Karst in Vietnam covers an area of about 60,000 km 2 , i.e. 18 % of the surface of the country. The country has an annual average temperature of 24°C, an annual average rainfall of 2300 mm and a relative humidity of about 90%. Karst in Vietnam is typified by peak cluster‐depression landscapes ranging in elevation from 200 to over 2000 m. Tower and coastal karst landscapes also exit. Because of naturally favourable conditions, karst ecosystems are diverse and very rich. Higher plants (cormophytes) are abundant. They are represented by approximately 2000 species, 908 genera, 224 families, 86 orders and 7 phyla. They form a thick vegetation cover of evergreen tropical rainforest. Knowledge about lower plants is limited. The fauna is rich and diverse. Phyla such as Protozoa, Vermes, Mollusca and Arthropoda are yet ill known. Preliminary results show that the phylum Chordata is represented by 541 species from 80 families, 40 orders and 5 classes. There exist many precious and rare mammals, in particular some endemic species such as Trachypithecus poliocephalus, T. delacouri, Rhinopithecus avanculus, Rhinolophus rouxi, Seotoma dineties and Silurus cuephuongensis. The class Insecta has about 2000 species. The fast population growth, particularly in the mountainous areas of the country, triggers an increasing demand for land and therefore threatens the ecosystem. To obtain land for farming, people have cut, burned and destroyed natural forest cover; resulting in occurrence of hazards such as soil‐loss, water‐loss, flash floods, mud‐rock flows, rock‐falls, severe drought, water logging and changes of karstic aquifers etc. Poaching precious animals and illegal logging are increasing. In contrast to other natural systems, karst ecosystems cannot be reestablished once damaged. Living karst landscapes will become rocky desert ones without life. Conservation of karstic environmental systems in general and karstic ecosystems in particular should not be the sole vocation of scientists but also a duty and responsibility of authorities and people from all levels. A good example of a multidisciplinary approach to karst‐related problems is the implementation of the Vietnamese‐Belgian Karst Project (VBEKAP): “Rural development in the mountain karst area of NW Vietnam by sustainable water and land management and social learning: its conditions and facilitation”. The aim of this project is to improve living conditions of local people and sustained protection and management of the karst environment and ecosystem.

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Acta Geologica Sinica - English Edition

地质学报主要报道中国地质科学理论和基础研究的最新和最重要的成果以及新技术。发表论文涉及地层学、古生物学、地球起源与历史、构造地质学、构造学、矿物学、岩石学、地球化学、地球物理学、矿床地质学、水文地质学、工程地质学、环境地质学、区域地质学和地质勘探新理论、新技术。

Acta Geologica Sinica (English Edition) primarily reports the latest and significant achievements in the theoretical and fundamental research of geological sciences in China, as well as new technologies. The published papers cover a wide range of topics, including stratigraphy, paleontology, the origin and history of the Earth, structural geology, tectonics, mineralogy, petrology, geochemistry, geophysics, deposit geology, hydrogeology, engineering geology, environmental geology, regional geology, and new theories and technologies in geological exploration.

《Acta Geologica Sinica (English Edition)》主要报道中国地质科学理论和基础研究的最新和重要成果，以及新技术。发表的论文涵盖了地层学、古生物学、地球起源与历史、构造地质学、构造学、矿物学、岩石学、地球化学、地球物理学、矿床地质学、水文地质学、工程地质学、环境地质学、区域地质学以及地质勘探的新理论和新技术。

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地球科学	3
地球科学, 地球科学综合	4

Characteristics of Karst Ecosystems of Vietnam and Their Vulnerability to Human Impact

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Category	Quartile
GEOSCIENCES, MULTIDISCIPLINARY	1