Nghiên cứu đa dạng thành phần loài và đánh giá một số chỉ số đa dạng sinh học cây thuỷ sinh tại các sinh cảnh khác nhau ở huyện Cù Lao Dung, tỉnh Sóc Trăng

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Tác giả: Minh Quân Đặng, Văn Ni Dương, Văn Lợi Lý, Ngọc Phương Thảo Nguyễn, Thị Thùy Nhiên Nguyễn, Trọng Hồng Phúc Nguyễn, Thành Đạt Phan, Thị Hằng Phùng

Ngôn ngữ: vie

Ký hiệu phân loại: 577.6 +Aquatic ecology Freshwater ecology

Thông tin xuất bản: Khoa học (Đại học Cần Thơ), 2022

Mô tả vật lý: 140-150

Bộ sưu tập: Metadata

ID: 498805

Thêm vào giỏ

Nghiên cứu được thực hiện tại Cù Lao Dung trong 2 năm (2018-2020) với mục tiêu đánh giá đa dạng sinh học và tác động của môi trường đến hệ thực vật thuỷ sinh bậc cao. Các sinh cảnh ngập nước được chia thành 3 khu vực nước ngọt, nước lợ và nước mặn với 18 tuyến điều tra và 28 ô tiêu chuẩn. Kết quả về đa dạng thành phần loài thu được 58 loài thuộc 49 chi, 30 họ của 2 ngành là Dương xỉ (Pteridophyta) và Ngọc Lan (Magnoliophyta). Trong ngành Ngọc Lan có tỉ lệ thành phần loài giữa lớp Ngọc Lan và lớp Hành (M/L) là 0,65. Hệ thực vật thuỷ sinh ở khu vực nghiên cứu có các đặc trưng (1) cấu trúc bậc họ với tỉ lệ họ đơn loài rất cao (73,33%)
(2) số lượng loài ở các sinh cảnh nước ngọt cao nhất
(3) tỉ lệ loài có tác dụng làm thuốc là 84,48%
(4) Dừa nước (Nypa fruticans) là loài xuất hiện ở tất cả các sinh cảnh với tần suất cao nhất
(5) Tỉ lệ A/F của các loài thuộc 3 sinh cảnh đều thuộc dạng phân bố Contagious
(6) Chỉ số đa dạng Shannon (H) ở sinh cảnh nước ngọt, nước lợ, nước nặm lần lượt là: 5:3,72:3,01. Môi trường tại đây khá ổn định và phù hợp với các nhóm cây thuỷ sinh nhiệt đới.This study was conducted at the wetland habitat of Cu Lao Dung district in 2 years (2018-2020) with the aim of assessing biodiversity and environmental impacts on aquatic plants. This wetland habitat was divided into 3 areas including freshwater, brackish water and saltwater with 18 transects and 28 standard units. The results of species composition diversity obtained 58 species of 49 genera, 30 families, 2 phyla (Pteridophyta and Magnoliophyta). In the Magnoliophyta phylum, the ratio of the two classes Magnoliopsida and Liliopsida (M/L) was 0.65. The aquatic plants in the study area have the following characteristics: (1) at the level of family taxonomy, the proportion of monotypic families was very high (73.33%)
(2) the number of species in freshwater habitats was highest
(3) the percentage of species with medicinal use is 84.48%
(4) Nypa fruticans occurred in all habitats with the highest frequency
(5) the A/F ratios of the species in the three habitats were mostly in Contagious distribution
(6) the Shannon diversity index (H) in freshwater, brackish water, and saltwater was 5: 3,72 : 3,01 respectively. Biodiversity indexes showed that the environment is stable and suitable for tropical aquatic plants.

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