Pantabangan Dam watershed managers Dong and Nel would like to determine the appropriate reforestation species between (1) the broad-leaved evergreen climax Hopea plagata (Yakal-saplungan), and (2) the small-leaved deciduous pioneer Delonix regia (Fire tree) in different areas of the basin. Thus, they conducted a simple plant transpiration experiment with four treatments (viz. normal, lighted, fanned, and covered) for the two species. Refer to the gathered data in Tables 8.1 and 8.2 and help them compute for the rate of transpiration (cm3/min) of both plant species at different set-ups. Likewise, portray the trend of the results of experiment using a line graph. Based on the derived theoretical data and with their primary goal to conserve water, help Dong and Nel decide on the following management considerations: Which species is better suited to be planted during summer when there is higher solar incidence? Why? Which of the two species is not suited to be planted in windy slopes of the watershed? Why? Which species is naturally more adapted to be planted in secondary forests where humidity is higher? Why?
Nutrient Cycle
The chemical nutrients that are essential for the synthesis of living matter are taken from the physical environment. After the death and decomposition of living organisms, they are returned to the environment to be used over and again. This cyclic back and forth regenerative movement of chemical elements between organisms and their physical environment is known as the biogeochemical cycle or nutrient cycle. Since these elements serve as the essential chemical nutrients of organisms, their cyclic movements are also called nutrient cycling or mineral cycling. Minerals are not uniformly distributed all over the ecosystems but are more concentrated in specific compartments, called pools. The major biogeochemical cycles include the water cycle, nitrogen cycle, carbon cycle, phosphorus cycle, calcium cycle, sulfur cycle, etc.
Biosphere
The geologist Eduard Sues coined the term biosphere. The biosphere is characterized as a part of the earth, which includes ground and air. Moreover, the organisms on earth live in the biosphere. The biosphere is a confined area on the earth's surface where water, soil, and air combine to promote life. Several different types of life exist here.
Pantabangan Dam watershed managers Dong and Nel would like to determine the appropriate reforestation species between (1) the broad-leaved evergreen climax Hopea plagata (Yakal-saplungan), and (2) the small-leaved deciduous pioneer Delonix regia (Fire tree) in different areas of the basin. Thus, they conducted a simple plant transpiration experiment with four treatments (viz. normal, lighted, fanned, and covered) for the two species. Refer to the gathered data in Tables 8.1 and 8.2 and help them compute for the rate of transpiration (cm3/min) of both plant species at different set-ups. Likewise, portray the trend of the results of experiment using a line graph. Based on the derived theoretical data and with their primary goal to conserve water, help Dong and Nel decide on the following management considerations:
- Which species is better suited to be planted during summer when there is higher solar incidence? Why?
- Which of the two species is not suited to be planted in windy slopes of the watershed? Why?
- Which species is naturally more adapted to be planted in secondary forests where humidity is higher? Why?
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