Bryophyte Diversity of On-Campus Old-Growth and SEcondary-Growth Forests in Montgomery County, Virginia

Allen W. Milby; Jordan S. Metzgar

doi:10.1656/045.028.0414

Intraspecific Diversity and Phylogeography in Southern Appalachian Dasycerus carolinensis (Coleoptera: Staphylinidae: Dasycerinae)

Insect Systematics and Diversity ◽

10.1093/isd/ixz022 ◽

2019 ◽

Vol 3 (6) ◽

Cited By ~ 2

Author(s):

Michael S Caterino ◽

Shelley S Langton-Myers

Keyword(s):

Genetic Diversity ◽

Anthropogenic Disturbance ◽

Secondary Growth ◽

Intraspecific Diversity ◽

Nuclear Marker ◽

Old Growth ◽

Rove Beetle ◽

Southern Appalachian ◽

History Of ◽

Cryptic Divergence

Abstract The southern Appalachian Mountains in eastern North America host exceptional diversity, a substantial proportion of which has been generated in place. Yet, beyond broad generalities, bio- and phylogeographical patterns, and the temporal scale of diversification in the region are poorly resolved. Using one mitochondrial and one nuclear marker, we analyze intraspecific diversity patterns in a flightless, litter-inhabiting rove beetle Dasycerus carolinensis Horn. Our goals were to reconstruct the phylogeographical history of this species, producing a dated intraspecific phylogeny, and to examine previous hypotheses of possible cryptic divergence across populations of the species. Samples derive from a mix of old-growth fragments and secondary growth forests, and we also ask whether old-growth remnants host a larger proportion of genetic diversity in the species. We recover a strong primary subdivision among major lineages across the French Broad River basin (dated to ~5.8 MYBP), and a secondary subdivision among western populations dating to ~4.5 MYBP. Most interpopulation uncorrected divergences exceed 5%, strongly suggesting cryptic differentiation. Old-growth populations do not show greater genetic diversity than secondary-growth populations, indicating that most populations have persisted through recent anthropogenic disturbance.

Download Full-text

Mapping Open Space in an Old-Growth, Secondary-Growth, and Selectively-Logged Tropical Rainforest Using Discrete Return LIDAR

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing ◽

10.1109/jstars.2013.2253306 ◽

2013 ◽

Vol 6 (6) ◽

pp. 2453-2461 ◽

Cited By ~ 4

Author(s):

Jinha Jung ◽

Burak K. Pekin ◽

Bryan C. Pijanowski

Keyword(s):

Open Space ◽

Tropical Rainforest ◽

Secondary Growth ◽

Old Growth

Download Full-text

Threatened birds of the Angolan Central Escarpment: distribution and response to habitat change at Kumbira Forest

Oryx ◽

10.1017/s0030605313001415 ◽

2014 ◽

Vol 49 (4) ◽

pp. 727-734 ◽

Cited By ~ 10

Author(s):

Aimy Cáceres ◽

Martim Melo ◽

Jos Barlow ◽

Paulo Cardoso ◽

Francisco Maiato ◽

...

Keyword(s):

Forest Cover ◽

Land Use Changes ◽

Secondary Growth ◽

Bird Species ◽

Bird Community ◽

Old Growth ◽

Forest Patches ◽

Old Growth Forest ◽

Remote Sensing Techniques ◽

Representative Area

AbstractKumbira Forest is the best representative area of Angola's Central Escarpment and the only site known to hold significant populations of four of the five threatened endemic bird species of this habitat. However, the forest is disappearing as a result of human activities. Remote-sensing techniques were used to assess changes in forest cover, and bird and habitat surveys were performed to assess the effect of land-use changes on endemic species and the bird community. No relationships could be established between the presence of endemics and habitat and landscape variables. This lack of effect may be attributable to the low number of records and compounded by the mosaic structure of the landscape. Although forest cover has been maintained in Kumbira, old-growth forest has been replaced by secondary growth in many areas. Nevertheless these secondary-growth forest patches can maintain a bird community similar to that found in old-growth forest.

Download Full-text

An Approach to Mainstreaming Language-Disabled Children in the Elementary School

Language Speech and Hearing Services in Schools ◽

10.1044/0161-1461.0901.17 ◽

1978 ◽

Vol 9 (1) ◽

pp. 17-23

Author(s):

Karen Navratil ◽

Margie Petrasek

Keyword(s):

Elementary School ◽

Public Schools ◽

Oral Language ◽

School Age Children ◽

Montgomery County ◽

Elementary School Age ◽

Language Classrooms ◽

Language Pathology ◽

General Goal ◽

Resource Program

In 1972 a program was developed in Montgomery County Public Schools, Maryland, to provide daily resource remediation to elementary school-age children with language handicaps. In accord with the Maryland’s guidelines for language and speech disabilities, the general goal of the program was to provide remediation that enabled children with language problems to increase their abilities in the comprehension or production of oral language. Although self-contained language classrooms and itinerant speech-language pathology programs existed, the resource program was designed to fill a gap in the continuum of services provided by the speech and language department.

Download Full-text