Table 2

Effect of Open Top Chambers on light, soil moisture and humidity

Community

PAR

Soil moisture

Relative humidity

Annual

Summer

Annual

Summer

Annual

Summer

(Difference between control plots and OTCs as percentage)


Falkland Islands

-7.3 *

-5.4

grass

(-9.6)

(-8.7)

-

-

-3.5

-5.9 **

dwarf shrub

(-4.8)

(-2.1)

-20.2 *

-12.3**

-2.0

-4.3 **

Signy Island

-12.3 *

-7.1

lichen

(-5.5)

(2.6)

-9.9 *

-20.1**

-2.7

-2.5 **

moss

(-19)

(-16.2)

-4.5 *

-8.8 **

-1

-1.3 **

Anchorage Island

-28.1 *

-9.2

lichen

(-31.7)

(-9.6)

-

-

1.7

-3.1 **

moss

(-22.8)

(-8.9)

-2.8 *

-7.5 **

1.2

1.8 **

* p < 0.05, ** p < 0.01


Effect of OTC deployment on photosynthetic active radiation (PAR) (n = 2 for each location but only 1 for each community), soil moisture and relative humidity as a percentage of the control value based on annual and summer means. The PAR values for each location are the means of the two values between brackets, indicating communities.

Bokhorst et al. BMC Ecology 2007 7:15   doi:10.1186/1472-6785-7-15

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