Wednesday, 27 April 2011

Trip 4: The first Multi-temporal scanning of conifers using SALCA

The weather on our fourth trip is distinctly more overcast than our previous visits and the air is much cooler. Upon arriving at plot 2, the canopy has changed dramatically in just 1 week:

Phenological Observations - Plot 2:  There is leaf growth on the Birch and Rowan, but this is nothing compared to the Oak trees, which have completed first leaf and some of the trees are almost at full leaf in just one week. The canopy is now significantly covered with foliage. The undergrowth is greening up significantly, with large bracken unfurling and tangles of brambles appearing from autumn's leaf litter.

Fisheye photo at plot 2

The weather is improving as we make our way to site 3 and the sun is rapidly burning away all of the cloud cover.

Phenological Observations - Plot 3: The taller branches of the Sweet Chestnuts are starting to exhibit budburst with most even showing first leaf. The lower canopy consisting of younger trees is significantly more developed with leaves upto 50 mm in length. There is still little undergrowth, with just a few patches of moss appearing from the leaf litter

First leaf at plot 3

Phenological Observations - Plot 4: As expected, the coniferous canopy appears to have changed very little in one week, but the undergrowth has exploded into life. Bracken is the most common species here, growing in tall stalks in the shade, with bushier plants growing where there appears to be more sunlight. The maximum height is 1.3 m.

Setting up times are reducing with increased familiarity and we are currently taking steps towards analysis of the hemispherical fisheye photographs, which will provide a useful comparative result for Gap Fraction Analysis.

I am still very much on the menu as far as the mosquitos are concerned.

Oliver Gunawan
27th April 2011

No comments:

Post a Comment