laboratory report

Topics: Grassland, Poaceae, Grass Pages: 8 (1165 words) Published: October 12, 2014
Republic of the Philippines
Eastern Visayas State University
College of Arts and Science

Natural Sciences Department

Charisse Irene S. Eusores Pearl Aphrodite B. Carnice , MSSS BSES-4A September 6, 2014

LABORATORY REPORT 1
DIVERSITY OF INSECTS IN GRASSLAND

INTRODUCTION:

Biodiversity simply means a constructed of biological used to describe the variety of life. It refers to the number and variety of organism within a particular area.
Grassland dominated by unsown wild plant communities can be called either natural or semi-natural habitats. The majority of grassland in temperate climate is semi natural. Although their plant communities are natural, maintenance depend upon anthropogenic activities such as low-intensity farming, which maintains these grassland through grazing and cutting regimes.

A self-evident but unobtrusive part of our environment grasses are the quintessence of simple and inconspicuous nature. Insect in general, but especially those residing on grasses are even less apparent.

Insect diversity is the variety of insects that is in a certain area. In this lab, compared the diversity or variety of insects in the grassland area . The purpose of these report was to see what area was more diverse and how diverse was the area. We used Species Richness, Simpson Index. Objective:

The objective of this insect laboratory report was to measure the diversity of insects in the grassland.To discover what area was more diverse by using the species richness using Simpson’s Index.

METHODOLOGY:

The activity conducted in grassland area. As assigned in the area the members brought a sweep net, bottle container, and cotton with alcohol. Then, the member measured the area in 20x20 square meters. The members sweep the net 30 times. Then classify and count numbers of each insect caught. Next, put the insect inside the bottle with cotton and alcohol to stun the insect. Lastly calculate the species using Simpson’s index formula.

RESULT AND DISCUSSION:

Table 1 Species composition of Community 1 (Grassland)
Insect Species
Number of Individuals
Annual Cicada(Tibicenpruinosa)
3
Beetles(Coleopera)
5
Grasshopper (Caelifera)
1
Total
9

Table 2 Data for Calculation of Simpson’s index for Community 1 (Grassland) Species
nᵢ
nᵢ-1
nᵢ(nᵢ-1)
Cicada(Tibicenpruinosa)
3
2
6
Beetles(Coleopera)
5
4
20
Grasshopper(Caelifera)
9
0
0
TOTAL
N=9

26

Formula: D=
D=
D=
D=0.36(Moderate Diversity)
Species Richness=3
Table 3 Value for Simpson’s Index, D, for community 1
Community
D
Level of Diversity
1
0.36
Moderate

Discussion:
This experiment was conducted to know if how many types of species are presented in the grassland. The results was ended with show that the open space is moderate diversity . In the grassland area only 3 different species of insects were found. According to the results, the area has 3 species richness. According to the Simpson the open area is moderate diversity.

CONCLUSION & RECOMMENDATION:

CONCLUSION:

Therefore the result is moderate diversity so a greater number of successful species and a more stable ecosystem .

RECOMMENDATION:

1. A biodiversity need for conservation.
2. Endangered species need for protection.

Bibliography:

Annu.Rev.Entomol1995. 40:535-58: Annul Reviews Inc.

Biodiversity &ConservationNovember 2001,Volume 10, Issue 11, pp 1839-1863

WEAVER, J. E.; ALBERTSON, F. W
Grasslands of the Great Plains.Their nature and use.1956 pp. 395 pp.



APPENDECIES:

Republic of the Philippines
Eastern Visayas State University
College of Arts and Sciences

Natural Sciences Department

Charisse Irene S. Eusores Prof. Pearl Aphrodite B. Carnice BSES-4A September 6, 2014

Laboratory 2...

Bibliography: Charisse Irene S. Eusores Prof. Pearl Aphrodite B. Carnice
BSES-4A September 6, 2014
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