The purpose of this study is to monitor the fruit production of three woody tree species that occur on the Sevilleta National Wildlife Refuge (NWR). Two monoecious species, Pinus edulis and Quercus turbinella, are assessed, as is a dioecious species, Juniperus monosperma. In August, fruit production is estimated for the three species at five sites within the Sevilleta NWR. For each of the species different protocols are used for estimating fruit production: P. edulis estimates are made using the number of cones per mature tree, Q. turbinellla estimates utilize the number of acorns per 0.1m2 of canopy surface area, and J. monosperma estimates use the number of berries per twig on female trees. In addition, the age and/or size of each individual tree was assessed at the beginning of the study. For P. edulis and J. monosperma, distinctions continue to be made between young, medium, old, and very old trees; for Q. turbinella, canopy surface area is estimated.
Knowledge Network for Biocomplexity (KNB) Identifier
Data Policies: This dataset is released to the public and may be freely downloaded. Please keep the designated Contact person informed of any plans to use the dataset. Consultation or collaboration with the original investigators is strongly encouraged. Publications and data products that make use of the dataset must include proper acknowledgement of the Sevilleta LTER. Datasets must be cited as in the example provided. A copy of any publications using these data must be supplied to the Sevilleta LTER Information Manager. By downloading any data you implicitly acknowledge the LTER Data Policy (http://www.lternet.edu/data/netpolicy.html).
1997-01-01 - 2015-12-31
The Cerro Montosa Pinyon-Juniper site has been the location of major Sevilleta LTER research since 1989. Meteorological trends, net primary productivity, rodent and ground-dwelling arthropod populations, mycorrhizal responses to fertilizer, pinyon-juniper fruit and nut production, and pinyon mortality are all being investigated at this site. Previous studies have included analyses of pinyon tree rings for regional climate reconstruction.The UNM Field Station and USF&WS Headquarters are the primary support facilities for all research conducted on the Sevilleta NWR. As such the area has also been important as a research site - especially as regards meteorology and monitoring of rodent populations for Hantavirus. While the breaks above and behind are characterized as black grama dominated desert grassland, the immediate area around the Field Station is best described as an ecotonal mixture of Plains-Mesa Sand Scrub and Great Basin Scrub vegetaion greatly influenced by honey mesquite (Prosopis glandulosa) and the drainages which bisect the area at regular intervals and support many one-seed Junipers (Juniperus monosperma). Dominant grasses include 4 species of dropseed (Sporobolis contractus, S. cryptandrus, S. flexuosus & S. airoides) and indian rice grass (Oryzopsis hymenoides)The Goat Draw Juniper Savanna Core Site was established in 1998 in order to provide data at the lower end of the transition from the Pinon-Juniper Woodland habitat at the Cerro Montoso site to Juniper Savanna.Two-22 site is characterized as Juniper Savanna/Arroyo Riparian (Dick-Peddie 1993) and is located on the west side of SNWR at the foothills of the Ladrone Mountains.Coordinates from center of plotCoordinates from Center of plotCoordinates from center of plotCoordinates from center of plotCoordinates at middle of plotCoordinates in middle of plotCoordinates from center of plotCoordinates from center of plot
Zlotin, Roman (2010-09-15): Tree Mast Production in Pinyon-Juniper-Oak Forests at the Sevilleta National Wildlife Refuge, New Mexico (1997- present). Long Term Ecological Research Network. http://dx.doi.org/10.6073/pasta/f6cb97e094966c0af30206e767b0b2c2