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中加联合野外课程博客(中国镜像站)

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[2013年8月19日] - 湿地调查 wetland survey (Team Hoary Sedges)  

2013-08-26 10:46:58|  分类: 2013 Field Cours |  标签: |举报 |字号 订阅

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Blog Entry Written by Team: Hoary Sedges (Carex canescens)

Team Members: Leslie Bothwell (Queens)  Ziruo DING (Tongji), Yueting XING (BNU), Qi Liu (Fudan)

 [2013年8月19日] - 湿地调查 wetland survey (Team Hoary Sedges) - 中加联合野外课程 - 中加联合野外课程博客(中国镜像站)[2013年8月19日] - 湿地调查 wetland survey (Team Hoary Sedges) - 中加联合野外课程 - 中加联合野外课程博客(中国镜像站)

 Giant Swallowtail  monarch butterfly

[2013年8月19日] - 湿地调查 wetland survey (Team Hoary Sedges) - 中加联合野外课程 - 中加联合野外课程博客(中国镜像站)[2013年8月19日] - 湿地调查 wetland survey (Team Hoary Sedges) - 中加联合野外课程 - 中加联合野外课程博客(中国镜像站)
   GPS track of wetland Yueting(left) and Ding(right) working at wetland survey

            Today was our first day in the field collecting data on our individual wetlands.  Each of the eight groups in the class were assigned a particular wetland to perform an analysis of wetland diversity, using knowledge and skills gained in the course thus far.  Our group’s wetland is named Round Field Marsh.  The features to be analyzed include a survey of mammals, invertebrates, birds, amphibians, phytoplankton, and surrounding emergent vegetation.  As well, we must take note of other critical features of the wetland such as soil type and water quality (including measurements of oxygen, pH and conductivity).  

             We arrived at our Marsh following a ten minute drive through the rolling countryside that surrounds QUBS.  Our particular wetland is a palustrine marsh which fills in during spring flooding and then dries up over the heat of the summer.  The water covered areas of our wetland are thus quite minimal as it is late August. 

             Though we have all worked to develop the skills required, our team members each brought an individual strength to the wetlands survey exercise.  Ding has become the master GPS operator, taking a complete survey along the circumference of the Marsh.  Yueting is particularly adept at identification of plants, using her past experiences with plants surveying in China to create a list of the plants in our wetland.  Qi, Leslie and Yueting are also all interested in photography, thus our group was lucky to end the day with a nice supply of great shots of Round Field Marsh. 

             To name a few species we saw during the day, we saw a monarch butterfly (Danaus plexippus) fluttering about the milkweed (Asclepias syriaca) off the edge of the marshland.  We saw several leopard frogs (Lithobates pipiens) and a few others that were too quick for us to see.  We also saw a few snakes, however we only saw the backs of their tails as they slithered away too quickly for us to get enough of a view to name them specifically.  We presumed following a discussion with Professor Lougheed that they were most likely water snakes.   

             We came across a few challenges along the way.  As our wetland has minimal water compared to the other marshes, an accurate measurement of the shoreline proved challenging.  We came across another challenge in measuring invertebrates within the waters of the marsh- the grasses growing in the area covered too much of the soil to enable a dip net to capture a large amount of life within the water.  We were able to work together and collaborate on ideas to overcome these challenges.  We found this was both a useful and interesting enhancement to our wetland study; although coming across challenges can seem surprising and intimidating, it’s very normal (and almost inevitable) in the field of science to come across obstacles.  These challenges must be tackled using creativity, insight, and in our team environment using a collaboration of team members ideas resulting in an optimal method. 

            Overall, we thoroughly enjoyed our day in the field.  We loved the challenge and excitement that is taking knowledge and theory learned in class into the field.


今天是湿地考察的第一天,每个小组各自分配到了一片湿地进行研究。我们小组的湿地是Round Field March,研究内容包括湿地内的动植物和重要特征如水质等的调查。这是一片由春季雨水形成的湿地,由于现在是夏季,只剩下较小的面积,没有开阔水面,所有地表水都覆盖有挺水植物,并且湿地范围内包含大量的灌木。上午,我们首先测定了湿地中心点的GPS坐标,然后沿湿地边界和各地表水区域进行了GPS的标记,绘出了湿地的大致地图。丁希若主要负责GPS的操作;邢悦婷拥有丰富的植物知识,主要进行植物的鉴定工作;刘齐、Leslie以及邢悦婷还拍摄了许多不错的照片。

 下午,我们对湿地中的两块水域分别进行了含氧量和pH值的测定,结果十分相近。这是一片含氧量低、弱碱性的湿地。我们也使用捕网对水域中的动物进行了捕捉,获得了一些底栖动物。我们还对区域内的草本植物进行了一定程度上的分类鉴别。

 在这一天中,我们在湿地里发现了各种蝴蝶和蜂类在内的多种昆虫,包括黑脉金斑蝶(Danaus plexippus)等,一些蛙类,如豹蛙(Lithobates pipiens),还看到了蛇,但是由于只看到了尾部并且很快逃走了,无法确定其确切的种类。

 在这一天中,我们遇到了不少困难,如湿地边缘布满灌木,难以通过;又如挺水植物的根茎错杂,捕网无法触及底部,所以效果不佳等。不过在小组成员的共同努力下,最终我们克服了这些困难。对我们来说,这是一次很好的体验,我们都在过程中收获了许多乐趣。

 

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