The Three Habitats of Kirikirist Stream By Using Macroinvertebrate - Management Assignment Help

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Study sites
The three sites that were selected to collect samples from the upper, middle and lower sites of the Kirikiri Stream in the Bay of Plenty of New Zealand 
 

Site 1: The upper site of Kirikiri Stream largely consists of native forest (Fig 2). The stream site was littered with forest debris and fallen trees. The stream bed consisted of large rocks. The forest canopy covered about 90 percent of the stream aerially. Organisms were living under the rocks. The stream was shallow at this point, but the flow was reasonably strong. It was hard to collect the invertebrates with the small space between the rocks. Water flow was fast, making it difficult to stand in the water.  

Upper reaches (site one) of Kirikiri Stream
Site 2: The middle site of the Kirikiri Stream was covered in exotic pine forests.  65 percent coverage of canopy. There were also big rocks in the site but comparatively less than site 1. Pine trees around the stream.

Site 3: The lower site of the stream was in an urban area. It was flowing through the city with an open canopy that had slight vegetation around the site. More leaf litter was noticed around the banks of the stream compared to other sites. The depth of water was not too deep, the flow rate of water quite slow.  The stream bed consisted mainly small rocks (10cm), hence, it was easy to use net to collect the samples of invertebrates.

Data collection
A survey was conducted at three sites of the Kirikiri Stream (see Figure 1). The survey was done in autumn season. A target was to collect 100 individuals from each site. Equipment included: net, pencil, small container, alcohol, sheet for the records of invertebrates. A fine net was used to catch the invertebrates from the three sites of the stream, which were placed in the riffles of the stream, because invertebrates choose to live in shallow water below the rocks. The invertebrates were collected by turning over rocks, then I used a brush to scrub invertebrates from the crevices.  

This process was repeated for the other two sites. After this, the invertebrates were pulled out from the net and put into the white tray to get the proper identification of organisms. Specimens were sorted and placed into small plastic labelled containers filled with methylated spirit (alcohol).  
 

Identification analysis
This includes the lab work, where specimens were examined and identified with the help of a microscope. During examination, I separated the invertebrates into their different order for taxonomy classification. The invertebrates were sorted and counted by order, class, genus and taxon score.

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