Effect of Grazing on the Plant Community of a Southern Brazilian Swamp
Tipo de material:
ArtigoAssunto(s): Recursos online:
Em: Floresta e Ambiente (Brazil) v. 26(3) p. 1-10; (2019)Sumário:
ABSTRACT
Swamps have high biological diversity and are the largest producers of biomass. However, such
ecosystems are threatened by human activities. This study analyzes the plant community structure
of two swamp sites, with and without grazing. A total of 200 sample units with 0.25 m2 were
distributed every 13 m to determine diversity, the Importance Value Index (IVI), and coverage.
Fifty species and 18 families were recorded. Luziola peruviana Juss. ex. JF Gmel had the highest
IVI, accounting for 62.57% of the relative coverage in cattle-influenced sites. In the portions
without cattle, Commelina diffusa Burm.f. had the highest IVI (24.33). The Shannon and Pielou
indexes were 2.18 nats.ind.–1 and 0.56, respectively, decreasing to 1.62 nats.ind.–1 and 0.47 in
grazing sites. There was less richness in the cattle grazing area, with a single species accounting
for a high percentage of coverage, indicating the possible role of grazing on the plant community
structure.
Keywords: diversity indexes, phytosociology, wetlands.
| Tipo de material | Biblioteca atual | Coleção | Número de chamada | Informaçaõ do volume | Situação | Devolução em | Código de barras |
|---|---|---|---|---|---|---|---|
Periódicos
|
Biblioteca Nacional de Agricultura - Binagri Agrobase - Periódicos | Periódicos agrícolas | 2019 26(3) | Online | 2025-0451 |
Publicação on-line; 40 ref.; 1 table; 4 illus.; Summary (En)
ABSTRACT
Swamps have high biological diversity and are the largest producers of biomass. However, such
ecosystems are threatened by human activities. This study analyzes the plant community structure
of two swamp sites, with and without grazing. A total of 200 sample units with 0.25 m2 were
distributed every 13 m to determine diversity, the Importance Value Index (IVI), and coverage.
Fifty species and 18 families were recorded. Luziola peruviana Juss. ex. JF Gmel had the highest
IVI, accounting for 62.57% of the relative coverage in cattle-influenced sites. In the portions
without cattle, Commelina diffusa Burm.f. had the highest IVI (24.33). The Shannon and Pielou
indexes were 2.18 nats.ind.–1 and 0.56, respectively, decreasing to 1.62 nats.ind.–1 and 0.47 in
grazing sites. There was less richness in the cattle grazing area, with a single species accounting
for a high percentage of coverage, indicating the possible role of grazing on the plant community
structure.
Keywords: diversity indexes, phytosociology, wetlands.
BINAGRI