Competition Restricts the Growth, Development, and Propagation of Carpinus tientaiensis: A Rare and Endangered Species in China

The protection and propagation of rare and endangered species are key to the preservation of their population development; however, due to the scarcity of individuals, the potential effects and status of rare and endangered species in the whole forest ecosystem are still poorly understood. Using data from a 60 × 140 m forest dynamic monitoring sample of the Carpinus tientaiensis (Betulaceae) species in Zhejiang of Southeast China. We assessed the population distribution and diameter at breast height (DBH) structure of the Carpinus tientaiensis species, which was a rare and endangered species, as well as intra- and interspecific correlation with other species. The results show that saplings (1 cm ≤ DBH < 5 cm) and juveniles (5 cm ≤ DBH < 10 cm) were more aggregated than larger individuals (DBH ≥ 20 cm) of Carpinus tientaiensis. The DBH size structure of all the trees shows an obvious inverted “J” distribution. With an increase in the DBH size category, the number of individuals gradually decreases. Due to the diffusion limitation, the spatial distribution patterns of all the tree individuals and roof geese in the sample land are increased at a small spatial scale, and as the spatial scale increases, the degree of aggregation decreases gradually. The relationship between different diameter stages of the population of Carpinus tientaiensis showed a consistent general trend. The spatial distribution of individuals with a large diameter on a small scale was significantly positively correlated (p < 0.001). With an increase in the scale, there was no significant correlation (p > 0.05) between individuals with a large diameter and individuals with a small diameter. There was no significant correlation (p > 0.05) between the population of Carpinus tientaiensis and other species in the sample, and the strong unidirectional competition of other species in the sample can be seen by the competition index. We found that interspecific competition restricts the growth and expansion of Carpinus tientaiensis, and it has adopted different ecological strategies to coexist with a population of common tree species occupying a similar living space.

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Natural population structure and spatial distribution pattern of rare and endangered species Dacrydium pectinatum

Acta Ecologica Sinica ◽

10.5846/stxb201905090948 ◽

2020 ◽

Vol 40 (9) ◽

Author(s):

刘浩栋，陈巧，徐志扬，吴春燕，陈永富 LIU Haodong

Keyword(s):

Population Structure ◽

Spatial Distribution ◽

Endangered Species ◽

Distribution Pattern ◽

Natural Population ◽

Spatial Distribution Pattern ◽

Rare And Endangered Species ◽

Rare And Endangered

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Genetic diversity and genetic structure of the rare and endangered species, Primula ranunculoides

Biodiversity Science ◽

10.3724/sp.j.1003.2013.09098 ◽

2014 ◽

Vol 21 (5) ◽

pp. 601-609

Author(s):

Wang Deyun ◽

Peng Jie ◽

Chen Yajing ◽

Lü Guosheng ◽

Zhang Xiaoping ◽

...

Keyword(s):

Genetic Diversity ◽

Genetic Structure ◽

Endangered Species ◽

Rare And Endangered Species ◽

Rare And Endangered

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Geoecological analysis of the Russian Federation regions representation in the state program “Environmental Protection”

Geodesy and Cartography ◽

10.22389/0016-7126-2020-957-3-47-53 ◽

2020 ◽

Vol 957 (3) ◽

pp. 47-53

Author(s):

E.A. Kravets

Keyword(s):

Endangered Species ◽

Environmental Protection ◽

Russian Federation ◽

The State ◽

Volga River ◽

Unequal Distribution ◽

State Program ◽

Rare And Endangered Species ◽

Rare And Endangered ◽

The Russian Federation

The author offers mapping and geoecological analysis of the Russian Federation regions presence in the state program “Environmental Protection”. The unequal distribution of the program’s targets and activities in different regions is revealed. A considerable number of relevant environmental problems for several mentioned regions have not been reflected in the program. It is important to increase the area of specially protected natural areas for a significant number of subjects of the Russian Federation. The status “part of the territory occupied by specially protected natural territories of Federal value in the total area of the subject of the Russian Federation” is recommended to be assigned all regions of Russia. Identification and elimination of objects of accumulated environmental damage that threat to the Volga river is relevant, at least for all the regions in which the Volga flows. Not all regions with a high level of air pollution and/or large masses of air pollutants have the indicator “reduction of total emissions for the reporting year”. It is necessary to increase the Program of measures for the protection of rare and endangered species of plants and to expand the list of regions in which it is planned to protect rare and endangered species of animals.

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Research on a Biodiversity Conservation Value Assessment Method Based on Habitat Suitability of Species: A Case Study in Gansu Province, China

Sustainability ◽

10.3390/su13063007 ◽

2021 ◽

Vol 13 (6) ◽

pp. 3007

Author(s):

Xiaojiong Zhao ◽

Jian Wang ◽

Junde Su ◽

Wei Sun ◽

Haoxian Meng

Keyword(s):

Ecosystem Services ◽

Endangered Species ◽

Biodiversity Conservation ◽

Gansu Province ◽

Distribution Area ◽

Suitable Habitat ◽

Conservation Value ◽

Value Assessment ◽

Rare And Endangered Species ◽

Rare And Endangered

Quantitative assessment and evaluation of ecological parameters and biodiversity conservation are prime concerns for long-term conservation of rare and endangered species and their associated habitats in any ecological region. In this study, Gansu Province, a biodiversity hotspot, was chosen as the research area. We predicted the distribution patterns of suitable habitats for rare and endangered species. The replacement cost method was adopted to calculate the conservation value of rare and endangered species. The suitable habitat distribution area of rare and endangered wild animals reached 351,607.76 km2 (without overlapping area), while that of plants reached 72,988.12 km2 (without overlapping area). The conservation value of rare and endangered wildlife is US $1670.00 million. The high-value areas are mostly concentrated in the south and north of Gansu Province. The conservation value of rare and endangered wild plants is US $56,920.00 million. The high-value areas are mostly concentrated south of Gansu Province. The conservation value is US $58,590.00 million a year, and its distribution trend is gradually decreasing from northeast to southwest, with the highest in the forest area south of Gansu Province, followed by the Qilian Mountain area in the north. These results are of great significance for future improvement of the evaluation index system of ecosystem services and the development of ecosystem services and management strategies.

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[First occurrence of Sea Lamprey, Petromyzon marinus Linnaeus 1758 (Agnatha, Petromyzontiformes, Petromyzontidae) in the River Mignone (Northern Lazio).]

Natural History Sciences ◽

10.4081/nhs.2021.510 ◽

2021 ◽

Vol 8 (1) ◽

pp. 29-34

Author(s):

Vincenzo Ferri ◽

Paolo Crescia ◽

Christiana Soccini ◽

Alessio Olini ◽

Stefano Celletti

Keyword(s):

Endangered Species ◽

Petromyzon Marinus ◽

Sea Lamprey ◽

Environmental Context ◽

Upstream Migration ◽

Rare And Endangered Species ◽

Fish Ladder ◽

First Occurrence ◽

Rare And Endangered

[The spring presence of two individuals of the Sea lamprey, Petromyzon marinus, in the River Mignone near Tarquinia (Northern Lazio) could highlight a new Italian reproductive site of this rare and endangered species. This exceptional possibility could certainly be favored by the good quality of both the waters of the Mignone, and the environmental context of the record, but would require the urgent equipment of the barrier of Le Mole with a fish ladder in order to allow the sea lamprey’s upstream migration towards the areas of the upper course, even more suitable for their reproduction]. [Article in Italian]

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