The native plants Kelp is important because it provides shelter and food for a lot of sea creatures. Kelp is also used by humans for many products, including toothpaste and ice cream. Kelp also serves as a buffer by absorbing energy from waves before the waves hit the shoreline, protecting many of the sandy beaches along the California coast. Phytoplankton is tiny plant that serves as food for many of the ocean creatures from the smallest of fish to large whales. Some scientists estimate that phytoplankton provide the earth with almost half of its oxygen.
Caffeine effect on Daphnia’s Heart Rate The experiment will show what and how caffeine affects the heart rate of the Daphnia (Water Flea) Hypothesis * The Daphnia’s heart rate will increase as the caffeine concentration is increased Daphnia A Daphnia is a tiny invertebrate, crustacean (related to shrimp) that has a clear outside skeleton (carapace) and jointed legs. Daphnia are ectothermic (cold-blooded), their body temperature changes with the surrounding environment. Extra reasoning Chemicals which enter Daphnia’s bodies can change their heart rate by interfering with the chemicals that nerves use to transmit signals. Chemicals that speed up heart rate are known as stimulants (Caffeine is an addictive stimulant) Caffeine increases the number of stimulatory neurotransmitters that are released which increase blood pressure. Method * Firstly create your solution of caffeine which you are going to use on the Daphnia, from 100% concentration (0.1) to 0% concentration (Pond water) * Secondly collect the Daphnia, using a pipette to extract one Daphnia from the fresh pond beaker.
INTRODUCTION Nereis succinea (commonly known as clamworm) are in Class Polychaeta. N. succinea belongs to a free-swimming group of worms. They have bristle like appendages which are used for respiration and allow them to swim or crawl along the sea floor (Campbell, 2008). N. succinea is ubiquitous in number and commonly resides in estuaries. Some species can also be found around mudflats and sand flats which are high in salinity.
In contrast, minerals might be absorbed not only from diet but also from the ambient water in developed fish. Fatty acids are one of the most important nutrients for most finfish species, and supplementation of dietary fatty acids improves survival and growth for marine fish larvae. Copper is one of the essential trace minerals, which plays an important roles within the activity of enzymes as well as within the metabolism; however, copper deficiency in the diet and ambient water reduce the growth rate of the fry considerably. There were two experiments tested and for which material and methods were such as wild adult pair of anemonefish, water temperature, and tanks. Experiment one was based on the effect of the copper on survival and growth of the fish which were examined under the semistatic condition with six different copper concentration.
This is why many aquatic animals have streamlined bodies so that they can move through the water easily. o Buoyancy – This refers to the upward pressure (or thrust) that is applied on the organism by its medium. Buoyancy is determined by the density of the medium and determines the floating ability of an organism. Water provides sufficient buoyancy for many organisms, eg, seaweed, which has many “leaves” which are, supported in water for maximum sunlight exposure, out of water it collapses. o Pressure – This is the downward force that is applied on an organism by its medium.
ECOLOGICAL ADAPTATION OF AQUATIC ORGANISMS INTRODUCTION All living organisms are affected by the environment they live in; therefore they have to undergo a few changes in order to fit in the environments they live in. Each ecosystem has its own environmental challenges and therefore the essence of this essay is to explain the ecological adaptation of aquatic organisms. The essay will start by defining the key words like adaptation and ecosystem followed by explaining the two types of aquatic ecosystems and how the aquatic organisms adapt in the two types of aquatic ecosystems. According to the Concise Oxford Dictionary (2004:5), adaptation is a change or the process of change by which an organism or species becomes better suited to its environment. According to Charles Darwin theory of evolution by natural selection, the organisms adapt to their environment to become better fitted to survive and passing their genes to the next generation.
As the ppm of dissolved oxygen increased so did the amount of fish there were in the water. Clearly, the fish prefer to be in water that has more ppm of dissolved oxygen. 2. Do background research – Utilizing at least one scholarly source, describe how variations in dissolved oxygen content in a body of water can affect fish populations. Answer = Based on research done by Elshout, Pires, Leuven, Bonga, and Hendriks, lower Dissolved Oxygen levels have a major impact on the fish population and reproduction.
The murkiness of the temperate waters is due to high productivity of plankton. The nutrient-rich waters are the source of phytoplankton and zooplankton, which can sustain the lives of fish, marine animals, birds, and humans. In a tropical marine environment, there is a stable year round climate which allows for few environmental changes, no real seasonal changes in sunlight, ocean water temperature, or surface nutrients. Thermocline; surface water (warmer) stays separated from the subsurface water (cooler) by a layer of water that rapidly changes temperature with depth. The nutrients that are produced through decomposition at the bottom of the aquatic environment are locked out from the warm surface water due to the thermocline.
Due to the harmful effects that this weed can have on the environment, experts have been forced to produce methods of controlling the noxious weed. These methods have included the weevil, an ant-sized insect feed on the growing tips of the salvinia, and chemical herbicides. Other organisms that live in this freshwater lake habitat have adapted to the habitat to help in their own survival. One of such adaptations includes the black swan adapting to feed on the roots of the salvinia weed, due to its abundance in the habitat. Aim: To investigate the biotic and abiotic features of Eli Lakes and in particular, the distribution and abundance of a species.
Examples of such environmental factors include light intensity, temperature, and distance from a light source(1). Elodea condensers, also known as American water weed, is a common, aquatic plant in North American lake ecosystems. It provides both food and habitat for many aquatic life forms. Elodea can grow in a wide range of conditions, including various depths of water and in various sediment types (2). In addition to its ecological importance, Elodea is commonly sold as an aquarium plant.