Site will help: Http://www.fws.gov/wetlands/status-and-trends/index.html irst st
ID: 168253 • Letter: S
Question
Site will help: Http://www.fws.gov/wetlands/status-and-trends/index.htmlirst stin The question you are addressing for your first post is: What do you think is the biggest threat to bodies of water and/or the organisms that live in them in the Pacific Northwest? For this question "bodies of water" can be any type of wetland, rivers, lakes, Puget Sound, etc You can focus on a threat to a specific ecosystem type or location (e.g. bog, marsh, Puget Sound etc.) or on a specific organism that lives in that ecosystem (e.g., Chinook salmon, orcas, great blue heron, etc.) Note this organism cannot be the same as the one you are researching for your species report! l. Determine what body of water or organism you are focusing on 2. Decide which threat to that body of water or organism is the greatest or the most immediate threat. 3. Find information from a scientific study that supports your point of view Note: You do not necessarily have to find a scientific paper to find information from a scientific study. Reports put out by many organizations summarize information from scientific studies, and many newspaper reports contain information from scientific studies 4. Post this information. Your first post mustinclude: What is the specific threat and what is it threatening (e.g., wetlands or salmon or A direct quote with specific information from a scientific study that supports your claim. o Example of bad quote "water pollution is a threat to the Puget Sound" o Example of good quote "levels of nitrogen in the Puget Sound were two times higher this summer than the previous summer Complete citations for your information (name of newspaper/journal, author, title, date, title of website where found and complete url.
Explanation / Answer
This writing focuses on the threat to native species of various organisms of coastal rivers and streams from exotic ones. The smallmouth bass(Micropterus dolomieu) fish is an example of such exotic species which negatively impacts the native fishes (Carey et al., 2011). It threatens the existence of salmon which is an endangered species.
The migration of different types of fishes to different domains especially from sea to rivers helps in transferring nutrients of ocean to rivers but it has a negative impact on the native species due to the introduction of migratory fishes (Pittock, 2017). Smallmouth bass supports local economies by enabling angler fishing which helps in maintaining their stability and is also a well known sportfish.But, it creates an intense conflict which results in the decline of pacific salmon (Oncorhynchus spp.).
The vertebrates particularly fish, as well as the invertebrates like crayfish in their native range, are consumed by the smallmouth (cited in Warren, 2009). In the Pacific north west, smallmouth bass consumes similar prey items. Smallmouth bass is a non-selective, opportunistic feeder ( cited in Pflug and Pauley, 1984; Weidel et al., 2000; & Warren, 2009). In the Pacific north west, smallmouth bass frequently consumes juvenile Pacific salmon when there is an overlapping of these two species. For example, in Lake Washington, predation by smallmouth bass increases in spring, almost 50% of which is Salmon when juvenile sockeye salmon comes into the littoral areas occupied by smallmouth bass during outmigration (cited in Fayram and Sibley, 2000; Tabor et al., 2007).
References
1. Carey, M, P.,Sanderson,B,L.,Friesen,T,A.,Barnas,K,A.,& Olden,J,D. (2011).Smallmouth Bass in the Pacific Northwest: A Threat to Native Species; a Benefit for Anglers. Reviews in Fisheries Science,19(3),305–315.
2. Pittock, J.(2017).Pacific Northwest Coastal Rivers & Streams. WWF global. Retrieved from http://wwf.panda.org/about_our_earth/ecoregions/pacific_northwest_rivers_streams.cfm