issues. The purpose for this book becomes clear early in the story, what is happening to our climate, and how do we fix it. One of Hansen’s main points in this book is that sea levels are becoming dangerously high from ice sheet melting, and once they pass a certain melting point it will become impossible to stop sea level rise. One of the great strengths of this book is that Hansen is an expert in the climate change field and provides facts to back up his predictions. However, at times the…
Ecosystem energies flow through many trophic levels. A trophic level is the level organism's occupy within the food chain. There are generally five trophic levels: primary producers, primary consumers, secondary consumers, tertiary consumers, and apex consumers. These five levels all interact with each other to ensure bio-viability. The first trophic level contains the primary producers. They are called the primary producers because they produce their own food and energy. Primary producers…
each for food. A food chain is a sequence of organisms that feed on each other. Although the design of a food chain can vary by ecosystem, all food chains are made up of the same basic trophic levels. Trophic levels are the levels within the food chain where an organism obtains its energy. The tropical levels contain the producer, consumer and the decomposer. Food chain can also be represented by pyramid The above energy pyramid shows many grass providing food and energy to zebras on…
highly on the willows because they use them for dams and lodges. Next, the beavers provide a pond to many reptiles and amphibians. In return this increases many of different animals up and down the trophic levels. An ecosystem will become less diverse as there are changes from different trophic levels, a term called trophic cascades will begin to occur as the apex predator is eliminated from an ecosystem. With the willows being gone there is not a place for other small animals to live and eat…
6.3 Research question #3 How do mercury stable isotopes ratio change in mercury bio-uptake and bio-magnification in an Arctic marine ecosystem? There is still debate in the scientific community about Hg trophic transfer and/or in vivo transformations lead to MDF and MIF of Hg isotopes (Bergquist and Blum, 2007; Perrot et al., 2012; Senn et al., 2010; Kwon et al., 2012; Das et al., 2009). The MDF and MIF signatures of food webs may help to identify major sources and processes leading to…
biodiversity of an ecosystem? Before we were given the question, we were taught that biodiversity is about relative abundance and species richness. Just recently we learned about the transfer of energy in food webs, while also learning more about trophic levels. Looking at how much energy you gain and how much an organism needs, I learned that eating straight off a source of plants would help organisms grow and prosper. For our group we examined the producers of the ecosystem who are at the…
The resources that street-level bureaucrats have to work are very inadequate. Yet, the demand from the public, or clients, is always increasing. As a result, street-level bureaucrats are constraints to the resources. Street-level bureaucrats also have broad discretion and that’s because of the constraints they are force upon. The resources that they have to work with also make the goals of street-level bureaucrats ambiguous and conflicting. Yet, street-level bureaucrats try to do their best,…
In the beginning there were only five members and it took the company a year to get the first electric pole up and ready for service. They spent the next decade developing their memberships, trustees and employees and learn how to function as an organization. After WWII the company really started to develop by hiring more employees, purchasing trucks and installing new services. In the 1960’s is really were you see the most growth in the company. In that year the doubled there service territory…
There has been different research that proposed to explain how working memory capacity and different processing strategies enhance or interfere with memory performance. Although the literature cover different research, this review will focus in encoding and retrieval process of information, and the importance of working memory capacity. There is an important relation between individual differences in Working Memory Capacity (WMC) and retrieving information from long-term memory (LTM). In this…
One study found that blood lead levels predict academic performance more accurately than poverty or class size. As teens, those exposed as children have higher rates of teen pregnancy, juvenile delinquency, depression, panic attacks, and kidney disease. Ultimately, adults exposed as children…