Investigating the Control Dynamics of an Algae-Brine Shrimp Ecosystem 113437768 Introduction The purpose of this lab is to investigate whether an ecosystem consisting of marine algae and brine shrimp are controlled by top-down or bottom-up mechanisms. The terms top-down and bottom-up in the context of ecology describe which trophic levels are enforcing population pressures on the others. Thus‚ the top-down mechanism of control holds that consumers are responsible for determining the abundance of
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Algal Research 2 (2013) 445–454 Contents lists available at ScienceDirect Algal Research journal homepage: www.elsevier.com/locate/algal Process development for hydrothermal liquefaction of algae feedstocks in a continuous-flow reactor Douglas C. Elliott ⁎‚ Todd R. Hart‚ Andrew J. Schmidt‚ Gary G. Neuenschwander‚ Leslie J. Rotness‚ Mariefel V. Olarte‚ Alan H. Zacher‚ Karl O. Albrecht‚ Richard T. Hallen‚ Johnathan E. Holladay Pacific Northwest National Laboratory‚ P.O. Box 999‚ MSIN P8-60
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take long before we have used up all of what we have become so dependent upon. That is why the world is looking at a new source of energy. A very small and unexpected source that most would not even have considered an option; algae. Using biodiesel fuels harvested from algae is not only helpful for the environment‚ but is a smarter way to produce alternative energy‚ save money‚ create jobs and eliminate America’s dependency on foreign oil. The use of biodiesel fuel has been around since the beginning
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detergents and household fertilizers has caused an excess of algae around the south shore. From the data and graphs presented to me on pages 2‚ 3‚ and 4‚ I believe the algae accumulation in the lake is the cause of the dead fish. It could be because the algae are using up vital oxygen sources that the fish need to survive. Table A on page 3 shows the amount of dead fish increase as the number of algae cells increase. This shows that the algae and fish are competing for oxygen‚ and the fish are losing
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involved the following: 1. Quadrats a. Local frequency a.i. This involved individually counting the abundance of sea cucumber and macro algae (Padina) besides turf algae within the boundaries of the quadrat. a.ii. This also allowed us to assess the general distribution of particular species along the transect. b. Percentage cover b.i. The abundance of turf algae was measure using this method. This survey was conducted within the individual segments of the 25-square quadrat. It was instructed that
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Mutually beneficial associations with other organisms: solar energy captured by the protist is used by host‚ which shelters and protects the protist Diverse Modes of Nutrition Photosynthetic protists are collectively known as algae Single-celled‚ non-photosynthetic protists are collectively known as protozoa Diverse Modes of Reproduction Most protists reproduce asexually by mitotic cell division Some also reproduce sexually Two
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Jeanine Campa Biology 101 10/20/2010 Ecology-Interspecific Interactions Lab Intro: Ecology is the study of how organisms interact within their environment. Every species interacts with its surroundings‚ whether it’s within their populations‚ community‚ ecosystem‚ etc. In this lab‚ we will be comparing two different species and how they grow alone as well as together‚ in the same environment. More specifically‚ in this lab‚ we will be dealing with one of the most important ideas in ecology‚
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GENERAL INTRODUCTION 1.1 Introduction. ‘’Fish’’ and ‘’Fishes’’ are two terms that usually used in worldwide. However‚ both are referring to different meaning. When referring to individuals of more than one species‚ the term ‘’fishes’’ is properly to used. Besides‚ the term ‘’fish’’ is correctly used when referring to one or more individuals of one species. Hence‚ the term ‘’fish’’ is suitable to be refer to 100 Rainbow Trout‚ while two different trout such as Brook Trout and Brown Trout is correctly
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the small amount of information would be the reason for the fewer fish and higher amount of algae may be due to algae blooms. Algae blooms are due to a rapid increase of algae and too much nitrogen in the water. From this information‚ I can deduce that there is a runoff problem from one or more of the farms where fertilizer is being spread and is entering into the lake. This in turn creates massive algae growth which not only blocks out sunlight but also requires mass amount of oxygen. The fish‚
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Rocky Shore Ecosystems- Point Cartwright Nicolas Cuny 11B Mr. Nisbett Due Date: 03/09/2010 Introduction: On the 23rd of August‚ the three biology classes or grade 11 at Redlands College visited the rocky shore ecosystems at Point Cartwright in Queensland. Two different types of rocky shore ecosystem were examined‚ the rock pool area‚ and the boulder area. We first examined areas within the rock pool area. The rock pool area has several specific features
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