Monteverde : Ecology and Conservation of a Tropical Cloud Forest

Acknowledgments The success of our work de-
pended on the generosity of residents of Monteverde
and surrounding towns for allowing us free access to
their farms to monitor the quetzals' movements.
Benito Guindon provided invaluable assistance with
project management and aspects of the fieldwork. The

study benefited from discussions with resident biolo-

gists Carlos Guindon, William Haber, and Willow

Zuchowski. This work was supported by grants from

Pew Charitable Trusts, W. Alton Jones Foundation,

and Homeland Foundation.

Figure 12.7. Distribution of radio-tagged Resplendent Quetzals in 1989 (stars), 1990

(circles), and 1991 (triangles) on the Pacific slope during the first part of their

migration. Life zones are numbered as in Figure 12.6. The quetzals' locations, which

represent centers of their home ranges that they used for about three months,

illustrate their dependency on habitats outside the preserve.

PATTERNS IN THE REGENERATION OF LAURACEOUS TREES

IN ABANDONED PASTURES

Martha Groom

he regeneration of abandoned pastures is lim-

ited by the survival of seeds in the soil, the

arrival of new seeds, the germination of seeds,

and the survival of seedlings and mature shrubs and

trees. By the time pastures are abandoned, most of the

seeds present at the time the forest was cleared have

died or germinated and been eaten or trampled by

cows (Nepstad et al. 1990). New seeds may be brought

in by wind or by bats, but bird-dispersed species are

not as likely to be dispersed into large clearings due

to the avoidance of open areas by birds. Soils in aban-

doned agricultural land are often depleted of nutri-

ents, and in pastures their structure is compacted by

cows (Nepstad et al. 1990). Thus, recruitment of

442 Conservation Biology

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