Comparison of macroinvertebrate communities of intermittent and perennial streams in the dry forest of Guanacaste, Costa Rica

Ecohydrology ◽  
2015 ◽  
Vol 9 (4) ◽  
pp. 659-672 ◽  
Author(s):  
Suzanne M. de Szoeke ◽  
Thomas L. Crisman ◽  
Paul E. Thurman
Keyword(s):  
Costa Rica ◽  
Dry Forest ◽  
Macroinvertebrate Communities

Vannella epipetala n. sp. Isolated from the Leaf Surface of Spondias mombin (Anacardiaceae) Growing in the Dry Forest of Costa Rica

2006 ◽  
Vol 53 (6) ◽  
pp. 522-530 ◽  
Author(s):  
LINDA A. AMARAL-ZETTLER ◽  
JEFFREY COLE ◽  
ABBY D. LAATSCH ◽  
THOMAS A. NERAD ◽  
O. ROGER ANDERSON ◽  
...  
Keyword(s):  
Costa Rica ◽  
Leaf Surface ◽  
Dry Forest ◽  
Spondias Mombin

Seasonal use of waterholes and pathways by macrofauna in the dry forest of Costa Rica

2019 ◽  
Vol 35 (2) ◽  
pp. 68-73 ◽  
Author(s):  
Victor H. Montalvo ◽  
Carolina Sáenz-Bolaños ◽  
Luis D. Alfaro ◽  
Juan C. Cruz ◽  
Flavio H. Guimarães-Rodrigues ◽  
...  
Keyword(s):  
Costa Rica ◽  
Linear Models ◽  
Bird Species ◽  
Dry Forest ◽  
Ecological Understanding ◽  
Large Bird ◽  
Temporal And Spatial ◽  
Trail Cameras ◽  
Almost All ◽  
North Western

AbstractTemporal and spatial scarcity of water in semi-arid and seasonal ecosystems often leads to changes in movements and behaviour of large vertebrates, and in the neotropics this dynamic is poorly understood due to logistical and methodological limitations. Here we used camera trapping to elucidate variation in patterns of seasonal use of waterholes and pathways by 10 large-mammal and four large-bird species in the dry forest of north-western Costa Rica. From 2011 to 2015, we deployed trail cameras at 50 locations, including waterholes and three types of pathway (roads, human trails and animal paths). We used Generalized Linear Models to evaluate the effect of location and seasonality on the rates at which independent photographs were taken. We found interacting effects of location and seasonality for the capuchin monkey (Cebus capucinus), the tiger heron (Trigrisoma mexicanum), the white-tailed deer (Odocoileus virginianus) and the tapir (Tapirus bairdii) suggesting that these species were the most influenced by waterholes during the dry season. Comparison of waterhole sites and specific types of pathways (roads, animal paths and human trails) showed that location influenced photo-capture rates of almost all species, suggesting a useful insight to avoid and account for bias in camera trap studies. Furthering our ecological understanding of seasonal water regimes and large vertebrates’ behaviours allow for better understanding of the consequences of climate change on them.

Influence of sea turtle nesting on hunting behavior and movements of jaguars in the dry forest of northwest Costa Rica

Biotropica ◽  
2020 ◽  
Vol 52 (6) ◽  
pp. 1076-1083 ◽  
Author(s):  
Víctor H. Montalvo ◽  
Todd K. Fuller ◽  
Carolina Saénz‐Bolaños ◽  
Juan Carlos Cruz-Díaz ◽  
Isabel Hagnauer ◽  
...  
Keyword(s):  
Costa Rica ◽  
Sea Turtle ◽  
Dry Forest ◽  
Hunting Behavior

scholarly journals “Bee-Flower-People Relationships, Field Biologists, and Conservation in Northwest Urban Costa Rica and Beyond.”

Zoosymposia ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 18-28
Author(s):  
G. W. FRANKIE ◽  
R. E. COVILLE ◽  
J. C. PAWELE ◽  
C. C. JADALLAH ◽  
S. B. VINSON ◽  
...  
Keyword(s):  
Costa Rica ◽  
Urban Areas ◽  
Land Use Changes ◽  
Field Research ◽  
Urban Environments ◽  
Dry Forest ◽  
University Of California ◽  
Forest Region ◽  
Undisturbed Forest ◽  
The University

The forests of Costa Rica are rich in a wide variety of pollinator types and a very diverse flora that supports them.  Our research group from the University of California, Berkeley and Texas A & M University, College Station has been researching the ecology of one pollinator group, the bees, in the northwest Guanacaste dry forest region since 1969.  Much natural forest existed in this area when we first began the work.  But, many land use changes have occurred over the years to present day to the point that it is difficult to find tracts of undisturbed forest suitable for field research, especially those not affected by wildfires, which are now common.        Further, urban areas in the region continue to grow with increasing numbers of people populating the region.  In this paper we provide an overview of our past bee-flower work for a historical perspective, and then weave in people that have now become an obvious ecological component of current bee-flower relationships.  We also explore new questions that have become relevant through time, especially those related to researchers and potential conservation opportunities to share their stories with audiences that may extend their knowledge for practical use.  Finally, we propose that researchers plan to devote some of their precious time establishing relationships with people in conserving what is left of bee-flower relationships in urban environments in Guanacaste and beyond in the country.  Avenues for extending this knowledge are explored in this paper.

scholarly journals Plant Killing by Mutualistic Ants Increases the Density of Host Species Seedlings in the Dry Forest of Costa Rica

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Sabrina Amador-Vargas
Keyword(s):  
Costa Rica ◽  
Host Plant ◽  
Host Species ◽  
Host Plants ◽  
Dry Forest ◽  
Bare Ground ◽  
Additional Food ◽  
Acacia Ants ◽  
Acacia Collinsii ◽  
Pseudomyrmex Spinicola

Some species of plant-mutualistic ants kill the vegetation growing in the vicinities of their host plant, creating an area of bare ground (clearing). The reduced competition in the clearing may facilitate the establishment of host species sprouts (clones and seedlings), which in turn benefits the ants with additional food and shelter (“sprout-establishment hypothesis”). To test this hypothesis, the density and origin ofAcacia collinsiisprouts growing inside clearings and in the vicinities of acacia plants without clearings were compared. Also, to assess the pruning selectivity of acacia ants (Pseudomyrmex spinicola), seedlings were transplanted into clearings. The reaction of ants towards unrewarding acacia seedlings (without food and shelter) was also tested. The density of acacia sprouts growing inside clearings was almost twice that in the vicinities of host plants without clearings, and sprouts were inhabited by nestmates of the colony that made the clearing. Clones and seedlings were found in similar proportions in the clearings, and ants did not kill unrewarding acacia seedlings or seedlings unrelated to their host. The benefit reported here for the ants could be in conflict with the host plant, especially when the plant has rhizomal reproduction.

Use of Trill Vocalizations To Coordinate Troop Movement Among White-Faced Capuchins: a Second Field Test

Behaviour ◽  
1995 ◽  
Vol 132 (11-12) ◽  
pp. 875-901 ◽  
Author(s):  
Aimee F. Campbell ◽  
Sue Boinski
Keyword(s):  
Costa Rica ◽  
Pacific Coast ◽  
Leading Edge ◽  
Cebus Capucinus ◽  
Dry Forest ◽  
Forest Site ◽  
La Selva ◽  
Behavioural Effects ◽  
Specific Direction ◽  
Group Members

AbstractThe white-faced capuchin, Cebus capucinus, employed a specialized vocalization, the trill, to coordinate troop movement at La Selva, an Atlantic wet-forest study site in Costa Rica. We analyse the contexts in which this intra-group vocalization was emitted, including responses elicited from other group members. A cumulative 26.6 hours of continuous samples and 3,314 spectrograms (including 1,295 trills) were analysed from a study troop with 16 focal subjects. These results generally corroboratc the conclusions of a comparable field study of white-faced capuchins at Santa Rosa, a Pacific coast dry-forest site in Costa Rica (BOINSKI, 1993, Amer. J. Primatol. 30, p. 85-100). At both sites, (I) trills were closely associated with the initiation of movement by a stationary troop in a specific direction. (2) Trills were emitted at a much higher rate in the leading edge of a travelling troop than in following positions. (3) Individuals often reinforced the efforts of other troop members to coordinate troop movement. (4) Lack of consensus among troop members over the travel route was evident. (5) In rare instances trills were employed in tactical maneuvers suggestive of intentionality and the ability to anticipate behavioural effects. Differences in the usage of trills at these two sites were also detected. (1) At La Selva all troop members, with the exception of infants, used trills in the coordination of troop movement, whereas at Santa Rosa marked age, sex and rank distinctions in the extent of participation were apparent. (2) Capuchins at Santa Rosa altered the trajectory of travelling troops with trills, even reversing directions, but not at La Selva. These disparities may follow from differences between the sites in the extent of visual and auditory contact typical among troop members, social structure, susceptibility to predation, and possible genetic variation.

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