Neptunium-237 in the marine environment determination in animal and plant species in the English Channel: Biological indicators and trophic relationships

1990 ◽  
Vol 138 (1) ◽  
pp. 49-61 ◽  
Author(s):  
P. Germian ◽  
G. Pinte
Keyword(s):  
Plant Species ◽  
Marine Environment ◽  
Biological Indicators ◽  
Trophic Relationships ◽  
English Channel

scholarly journals Antagonistic Interactions Between Fusaria Species and Their Host Plants Are Influenced by Host Taxonomic Distance: A Case Study From Mexico

2021 ◽  
Vol 9 ◽  
Author(s):  
Julieta Benítez-Malvido ◽  
Gerardo Rodríguez-Alvarado ◽  
Mariana Álvarez-Añorve ◽  
Luis D. Ávila-Cabadilla ◽  
Ek del-Val ◽  
...  
Keyword(s):  
Plant Species ◽  
Fungal Pathogens ◽  
Spatial Ecology ◽  
Host Plants ◽  
Rapid Assessment ◽  
Trophic Relationships ◽  
Wild Plants ◽  
Cultivated Plants ◽  
Economic Implications ◽  
Antagonistic Interactions

Interactions between cultivated and wild plants with their fungal pathogens have strong ecological, evolutionary and economic implications. Antagonistic interactions, however, have been scantily studied in an applied context by using ecological networks, phylogeny and spatial ecology concurrently. In this study, we describe for the first time, the topological structure of plant-fungi networks involving species of the genus Fusarium and their native and introduced (exotic) cultivated host plants in Mexico. For this, we based our study on a recent database describing the attack on 75 native and introduced plant species, including 35 species of the genus Fusarium. Host plant species varied in their degree of phylogenetical relatedness (Monocots and Dicots) and spatial geographical distribution. Therefore, we also tested whether or not plant-Fusarium networks are phylogenetically structured and highlighted the spatial correlation between pathogens and their host plants across the country. In general, the pathogen-plant network is more specialized and compartmentalized in closely related taxa. Closely related hosts are more likely to share the same pathogenic Fusarium species. Host plants are present in different ecosystems and climates, with regions having more cultivated plant species presenting the highest number of fusaria pathogens. From an economic standpoint, different species of the same taxonomic family may be more susceptible to being attacked by the same species of Fusarium, whereas from an ecological standpoint the movement of pathogens may expose wild and cultivated plants to new diseases. Our study highlights the relevance of interaction intimacy in structuring trophic relationships between plants and fusaria species in native and introduced species. Furthermore, we show that the analytical tools regarding host distribution and phylogeny could permit a rapid assessment of which plant species in a region are most likely to be attacked by a given fusaria.

scholarly journals Applying diversity index and dominant species in research and selection of some indigenous plant species to absorb Pb, Zn

2017 ◽  
Vol 8 (4) ◽  
pp. 240-246
Author(s):  
Thi Yen Ta ◽  
Thi Mai Thao Pham
Keyword(s):  
Plant Species ◽  
Dominant Species ◽  
Biological Diversity ◽  
Diversity Index ◽  
Biological Indicators ◽  
Cell Counting ◽  
Native Plant ◽  
Bidens Pilosa ◽  
Native Plant Species ◽  
Ipomoea Aquatic

The study was carried out at Dai Dong and Chi Dao communes, Van Lam District, Hung Yen Province. The biological diversity indexes and dominance index of species were used to identify native plant species which have the ability to absorb Pb and Zn. The results were verified by applying methods such as plant classification, quadrat cell counting, biological indicators and chemical analysis. Results showed that there are five species of plants with the highest dominant index calculated due to number of individuals in the study area including Bidens pilosa L (33.03%), Acroceras munroanum (8.14%), Commelina coelestis (7.83%), Carex capillacea (5.41%), Ipomoea aquatic (5.26%). Verified results showed that Bidens pilosa L, Acroceras munroanum, Commelina coelestis, Ipomoea aquatic can be used to treat Pb with the absorption concentration of 380 mg/kg, 288 mg/kg, 270 mg/kg, 223 mg/kg, respectively. Only Commelina coelestis can absorb Zn with the highest concentration of 73mg/kg. In summary, Pb absorption of dominant species in the study area is higher than the absorption of Zn. Nghiên cứu được thực hiện tại hai xã Đại Đồng và xã Chỉ Đạo, huyện Văn Lâm, tỉnh Hưng Yên nhằm xác định một số loài thực vật bản địa có khả năng hấp thụ Pb, Zn bằng cách sử dụng chỉ số đa dạng sinh học và chỉ số ưu thế loài. Kết quả được kiểm chứng bằng các phương pháp như phân loại thực vật, đếm ô quadrat, sử dụng chỉ số sinh học và phân tích hóa học. Kết quả cho thấy có có năm loài thực vật có chỉ số ưu thế cao nhất tính theo số lượng cá thể trong khu vực nghiên cứu là: Đơn buốt (33,03 %), Cỏ lá tre (8,14 %), Thài lài (7,83 %), Kiết tóc (5,41 %), Rau muống (5,26 %). Kết quả phân tích kiểm chứng thấy Đơn buốt, Cỏ lá tre, Thài lài, Rau muống có khả năng xử lý Pb với giá trị lần lượt là 380 mg/kg, 288 mg/kg, 270 mg/kg, 223 mg/kg. Trong khi đó chỉ có Thài lài là có khả năng hấp thu Zn với giá trị cao nhất là 73 mg/kg. Nhìn chung khả năng hấp thu Pb của các loài ưu thế tại khu vực nghiên cứu cao hơn so với khả năng hấp thu Zn.

scholarly journals Transfer of Tritium Released into the Marine Environment by French Nuclear Facilities Bordering the English Channel

2013 ◽  
Vol 47 (12) ◽  
pp. 6696-6703 ◽  
Author(s):  
Bruno Fiévet ◽  
Julien Pommier ◽  
Claire Voiseux ◽  
Pascal Bailly du Bois ◽  
Philippe Laguionie ◽  
...  
Keyword(s):  
Marine Environment ◽  
English Channel ◽  
Nuclear Facilities
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