In one instance, the wire was observed to cross a deep pool (3 m diameter) bounded by two tall hummocks
(> 0.75 m high).
Broad-scale estimates of C[H.sub.4] flux from northern wetlands have been difficult to obtain because of the spatial variability in moisture created by microtopographic features such as hummocks
and hollows, an important seasonal or temporal component that involves both changes in soil temperature as well as water table levels, and the role of different substrates in the soil for bacterial activity (Moore and Knowles 1990, Morrissey and Livingston 1992, Roulet et al.
One of the nests was in a moss clump of Brachythecium rivulare at the base of an ash tree and a hummock
of skunk cabbage.
fuscum lawn (surrounded by an equally high peat surface), and hummock
(about 1 [m.sup.2] xeric microsite protruding above the surrounding peat surface).
Francoeur and Pepin (1975, 1978) investigated the density and distribution of Formica dakotensis nests in spruce bogs in Quebec; Kannowski (1959) described the flight activities and colony-founding behavior of ants in Sphagnum bogs in Michigan; and Luken and Billings (1986) studied the effect of two species of ants on hummock
dynamics in an Alaskan peat bog.
Suddenly I deep-banked to avoid a snow ridge line, then nearly collided with an ice-glazed hummock
Talking to this scribe, Kashu Khan - an aged man who had encroached some space at Road No.4 of Bhains Colony by establishing a hummock
for loading and offloading the buffalos - said the KMC had removed his 'Dhakka' (hummock
called in local language) in the wake of anti-encroachment drive 'but alas, it did not even touch the weighbridge namely Dastgir Kanta illegally constructed on the government road just before his hummock
Ten feet of his backyard, including a grassy hummock
and knobby crabapple trees (all crawling with poison ivy) went over the cliff like a carpet slipping off a clothesline.
The probability of lack of contact of the pipeline with hummock
for some time period can be accepted as a design level of reliability and calculated as (Surkov, 2000):
The first time I slipped off a hummock
, my left foot went into 4 inches of water.
Each paired sampling set included the top of a hummock
and its adjacent hollow.