Determination of Plants Diversity and Similarity in Selected three Communities of Stachytarpheta jamaicensis (L.) Vahl | Chapter 3 | Innovations in Biological Science Vol. 7

 

Aims: to know and determine plants diversity and similarity in three communities of S. jamaicensis habitat.

Study Design: Explorative and descriptive.

Place and Duration of Study: Research in Gajahrejo Village, Pasuruan, East Java Province was conducted in August 2012; in Kepala Jeri Islands Batam, Riau Island Province in October 2014; and in Bissoloro Village, South Sulawesi Province conducted in October 2016.

Methodology: The study used exploratory and descriptive methods. Sample plots of 1m x 1m were determined and put around S. jamaicensis, which was found along the edge of village roads during exploration (purposive random sampling). Vegetation analysis was carried out to determine the composition, dominance, diversity, evenness and similarity of the species in each S. jamaicensis growing place by counting the Important Value Index, Similarity Index, Shannon Diversity Index, Domination Index, and Evenness Index.

Results: Assosiant plant species found in the three sites growing area of S. jamaicensis were 84 species, 74 genera and 28 families. There were six plant species obtained in the three sites growing area of S. jamaicensis, i.e., Ageratum conyzoides L., Axonopus compressus (Swartz) Beauv., Centrosema pubescens Bth., Chromolaena odorata (L.) R.M.King & H. Rob., Cynodon dactylon (L.) Pers and Mimosa pudica L. Axonoppus compressus was the most dominance species in Kepala Jeri Island and Bissoloro Village, whereas Panicum brevifolium L. was the most dominant species in Gajahrejo Village. The difference in floristic composition between the sites may be caused by environmental factors, human activity, land use systems and disturbance on fields where S. jamaicensis obtained.

Conclusion: The plants' diversity and similarity in the three sites growing area of S. jamaicensis habitat were different. There were 84 species, 74 genera and 28 Families found in three sites growing area of S.jamaicensis. There were six plant species obtained in the three sites growing area of S. jamaicensis, i.e., Ageratum conyzoides L., Axonopus compressus (Swartz) Beauv., Centrosema pubescens Bth., Chromolaena odorata (L.) R.M.King & H. Rob., Cynodon dactylon (L.) Pers and Mimosa pudica L. Axonoppus compressus (Swartz.) Beauv. was the most dominant species in Kepala Jeri Island and Bissoloro Village, whereas Panicum brevifolium L. was the most dominant species in Gajahrejo Village.

 

Author (s) Details

Solikin
Research Center for Ecology and Ethnobiology, National Research and Innovation Agency Jl. Raya Jakarta Bogor Km 46, Cibinong, Bogor West Java 16911, Indonesia.

 

Please see the link :- https://doi.org/10.9734/bpi/ibs/v7/775

Variation of Density and Biomass of the Ichthyofauna Associated to Soft Bottoms of a Western Coastal Lagoon of B.C.S., Mexico: A Recent Study | Chapter 6 | Research Aspects in Biological Science Vol. 3

From November 2016 to September 2017, a study of the variance in density and biomass of fish populations in the lagoon of La Paz, Mexico, was done. A total of 2763 organisms were gathered in an area of 5022 m2 with a total biomass of 211,422.93 g, a density and biomass of 0.550 lnd/m2 and 44.091 g/m2, respectively. The highest biomass was found in Zacatecas (11.179 g/m2), which is located north of the lagoon, while the lowest biomass was found in Grand Plaza (2.732 g/m2). The highest density was found in Yate Hundido, located northwest of the lagoon (0.129 lnd/m2), while the lowest was found at Las Palmas, located north of the lagoon (0.036 lnd/m2). The most common species was Diapterus peruvianus. with 683 individuals and 37,507.57 g of biomass The physicochemical parameters indicated two seasons with substantial variation, with higher summer temperatures (average of 27.45°C.) and lower winter temperatures (average of 22.49°C.). The Shannon-Weaver diversity index (H' = 2.133 bits/ind) showed a month-to-month difference (p = 0.050), with the highest value (H' = 2.133 bits/ind) in April and the lowest value (H' = 1.041 bits/ind) in June. The overall goal was to determine the biomass and density of resident and transitory fish species in the La Paz lagoon, and it was discovered that the biomass and density values recorded in the lagoon were linked to the spatio-temporal variation of the lagoon's temperature, as well as the resident and transient species found there the research field.

Author(s) Details:

Bruma R. Castillo-Rosas,
Departamento Académico de Ciencias Marinas y Costeras, Universidad Autónoma de Baja California Sur, CP 23080, La Paz, B.C.S. México.

Emelio Barjau-González,
Departamento Académico de Ciencias Marinas y Costeras, Universidad Autónoma de Baja California Sur, CP 23080, La Paz, B.C.S. México.

Juan Manuel López-Viva,
Departamento Académico de Ciencias Marinas y Costeras, Universidad Autónoma de Baja California Sur, CP 23080, La Paz, B.C.S. México.

José Ángel Armenta-Quintana,
Departamento Académico de Ciencia Animal y Conservación del Hábitat, Universidad Autónoma de Baja California Sur, CP 23080, La Paz, B.C.S, Mexico.

Javier Aguilar-Parra,
Departamento Academico de Sistemas Computacionales, Universidad Autonoma de Baja California Sur, CP 23080, La Paz, B.C.S, Mexico.

Elvia E. Aispuro-Felix,
Departamento Academico de Sistemas Computacionales, Universidad Autonoma de Baja California Sur, CP 23080, La Paz, B.C.S, Mexico.

Please see the link here: https://stm.bookpi.org/RABS-V3/article/view/7048