TOLERANCE OF LIVING ORGANISMS TO LIMITING FACTORS
Marjorie Villareal
INTRODUCTION
It is a recognized principle of Ecology that the interactions of organisms and environment are reciprocal. The environment not only determines the conditions under which life exists, but the organisms influence the conditions prevailing in their environment as well (Brett, 1969). When organisms encounter harsh abiotic conditions, they may have one of two responses. Evolutionary adaptations in their morphology, physiology or behavior may allow them to cope with physical factors (i.e. a)salinity, b)pH, and c)temperature) in the environment. When factors such as these determine the presence or absence of a species, we refer them as limiting factors.
The limiting …show more content…
There are zero mortality rates. In Table 2, rainbow fishes are under the treatment of cold temperature (e.g. 10-15°C). The opercular movement of rainbow fishes shifted from fast to moderate after 15 minutes. They settled from top to bottom as well as scattered but goes clumped after 30 minute observations. The swimming speed is slow all throughout with zero mortality rates. Under the hot treatment of the same fishes in Table 3, the opercular movements shifted from fast to moderate after 20 minutes. The fishes settled above throughout the observation. The swimming speed shifted from fast to moderate after 15 …show more content…
Their growth tolerance decreases as the salinity increases but only up to 10 ppt of salinity. There is almost no seed germination of the seed under salinity with 15 ppt. Zero germination rate is present under salinity having 20 ppt.
CONCLUSION
One of the most fundamental adaptations we can describe for an organism is its ability to cope with abiotic factors like temperature, pH and salinity. Rainbow fishes have very high tolerance to temperature since they have zero mortality rates when introduced to different temperatures. The fishes preferred the temperature under the control group which is around 25°C. The plant Brassica rapa on the other hand has very high tolerance to pH since they have high germination rate among the variety of pH treatments. Under salinity treatments, they can only tolerate up to 10ppt of salinity. The Brassica rapa plant will have its optimum growth under pH 5 and in the control group with almost zero
Marjorie Villareal
INTRODUCTION
It is a recognized principle of Ecology that the interactions of organisms and environment are reciprocal. The environment not only determines the conditions under which life exists, but the organisms influence the conditions prevailing in their environment as well (Brett, 1969). When organisms encounter harsh abiotic conditions, they may have one of two responses. Evolutionary adaptations in their morphology, physiology or behavior may allow them to cope with physical factors (i.e. a)salinity, b)pH, and c)temperature) in the environment. When factors such as these determine the presence or absence of a species, we refer them as limiting factors.
The limiting …show more content…
There are zero mortality rates. In Table 2, rainbow fishes are under the treatment of cold temperature (e.g. 10-15°C). The opercular movement of rainbow fishes shifted from fast to moderate after 15 minutes. They settled from top to bottom as well as scattered but goes clumped after 30 minute observations. The swimming speed is slow all throughout with zero mortality rates. Under the hot treatment of the same fishes in Table 3, the opercular movements shifted from fast to moderate after 20 minutes. The fishes settled above throughout the observation. The swimming speed shifted from fast to moderate after 15 …show more content…
Their growth tolerance decreases as the salinity increases but only up to 10 ppt of salinity. There is almost no seed germination of the seed under salinity with 15 ppt. Zero germination rate is present under salinity having 20 ppt.
CONCLUSION
One of the most fundamental adaptations we can describe for an organism is its ability to cope with abiotic factors like temperature, pH and salinity. Rainbow fishes have very high tolerance to temperature since they have zero mortality rates when introduced to different temperatures. The fishes preferred the temperature under the control group which is around 25°C. The plant Brassica rapa on the other hand has very high tolerance to pH since they have high germination rate among the variety of pH treatments. Under salinity treatments, they can only tolerate up to 10ppt of salinity. The Brassica rapa plant will have its optimum growth under pH 5 and in the control group with almost zero