Ecology Lab: Sweep Net Dataset:

Method: The purpose of this experiment was to determine the abundance of different insect species in different habitats, such as grassland and Woodlot. The experiment was taken place at York University Keele campus around east of Stong Pond and Saywell Woodlot on September-30-2014 and the data was collected at 3:00 pm – 5:00 pm. Experiment at grassland was taken at 3:00pm-3:50pm and Woodlot experiment taken at 4:10pm - 5:00pm at York University Keele campus. The weather was mostly cloudy and cold with the temperature of 17 degree Celsius. In this experiment the sweep nets technique for capturing the insects was used in grassland and woodland. The 20m transect was placed ramdonly in the middle of the grassland and the sweep net was held in hand, during this experiment I walked along the 20m transect and continuously moving the sweep net to capture the insects inside the net. There were more insects in the grassland becuase experiment was taken in the middle of the grassland. The 20m transect was placed on the edge of Woodlot and the sweep net was held in hand, during this experiment I walked along the 20m transect and continuously moving the sweep net to capture the insects inside the net. There were few insects captured on the woodlod because the experiment was taken on the edge of the woodlot. For both grassland and Woodlot experiment the process was repeated 10 times and for each transect i walked for approximately 5 mintues for each trail. The data was collected by counting the total number of insects inside the net for each trail and for each habitats. The total number of different insect species was differentiated based on their phenotypes and other features for each trail and for each habitats. The most abundant insect species on the Stond Pond area were bee = (German Yellowjacket (Vespula germanica)), fly (green bottle fly (Phaenicia app.)), crickets = (field cricket (Gryllus pennsylvanicus)), grasshopper (carolina grasshopper (Dissosteira caroline)), mosquito and the most abundant insect species on the Woodlot were crickets (field cricket (Gryllus pennsylvanicus)), mosquito and grasshoppers (carolina grasshopper (Dissosteira caroline)) . Data: Transect # 10x for each habitat Distance: 20m Time: Approximately 5 minutes per transects. Habitats: Grassland: 10 transects samples were taken at East of Stond Pond at York University Keele campus. Woodland: 10 transects samples were taken at Saywell Woodlot at York University Keele campus. Total number of insects captured: All the insects captured within 20m distance inside the sweep net were counted for each trial. Total number of unique rtus: The different insect species were observed and differentiated using their phenotype and other features for each trail. Observed Insect species: B=bee (German Yellowjacket (Vespula germanica)) C= Cricket (field cricket (Gryllus pennsylvanicus)), M=mosquito, F=fly (green bottle fly (Phaenicia app.)), G=grasshopper (carolina grasshopper (Dissosteira caroline)).

### 实验方法
本实验旨在测定草原与林地等不同栖息地内各类昆虫物种的丰度。实验于2014年9月30日在约克大学基尔校区（York University Keele campus）的Stong Pond东侧与Saywell林地开展，数据采集时段为当日15:00至17:00。其中草原组实验的采样时段为15:00-15:50，林地组实验的采样时段为16:10-17:00。当日天气以多云为主，气温为17摄氏度。
本次实验采用扫网法（sweep nets technique）采集昆虫：草原组在草原中部随机设置20米样带（transect），手持扫网沿样带行进，持续挥动扫网以捕捉网内昆虫；因采样点位处于草原中部，草原组捕获的昆虫数量更多。林地组则在Saywell林地的边缘设置20米样带（transect），同样手持扫网沿样带行进并持续挥动以捕捉网内昆虫；由于采样点位位于林地边缘，本次捕获的昆虫数量较少。两组实验均重复开展10次，每条样带的行走时长约为5分钟。
本实验通过计数每次采样中扫网内的昆虫总数量，完成不同栖息地的样本数据收集。同时依据昆虫的表型（phenotypes）及其他特征，区分每次采样及各栖息地内的不同昆虫物种。Stong Pond区域的优势昆虫类群为：蜜蜂（德国黄胡蜂（Vespula germanica））、蝇类（绿蝇（Phaenicia app.））、蟋蟀（田野蟋蟀（Gryllus pennsylvanicus））、蝗虫（卡罗莱纳蝗（Dissosteira caroline））以及蚊子；Saywell林地的优势昆虫类群为：蟋蟀（田野蟋蟀（Gryllus pennsylvanicus））、蚊子以及蝗虫（卡罗莱纳蝗（Dissosteira caroline））。

### 数据详情
1. 采样设置：每组栖息地均设置10条样带，单条样带长度为20米，每条样带的采样时长约为5分钟。
2. 栖息地采样详情：
- 草原组：10条样带的样本采集于约克大学基尔校区Stong Pond东侧区域。
- 林地组：10条样带的样本采集于约克大学基尔校区Saywell林地。
3. 昆虫捕获计数：每次采样中，沿20米样带扫网捕获的所有昆虫均被计数。
4. 独特类群总数：依据表型及其他特征，区分每次采样中的不同昆虫物种。
5. 观测昆虫类群：B=蜜蜂（德国黄胡蜂（Vespula germanica）），C=蟋蟀（田野蟋蟀（Gryllus pennsylvanicus）），M=蚊子，F=蝇类（绿蝇（Phaenicia app.）），G=蝗虫（卡罗莱纳蝗（Dissosteira caroline））。