|Summer bird density corresponds generally to the most densely forested regions. Circles represent population densities at specific study sites.|
BCR is presently working with a GIS specialist to turn our population data from the Forest Bird Survey of Connecticut and Rhode Island into density maps for the study area. The resulting work will illustrate summer and winter habitat and community data as well as data for densities and distributions of individual species. The resulting publication will serve as a companion to our recently release book, Forest Birds of Connecticut and Rhode Island, which is available via our publishing partner, Arts and Academic Publishing. As with all products of BCR, including videos, educational documents and scientific papers, it is available as an open access document.
Friday, March 23, 2018
Wednesday, March 14, 2018
Three tanks of gas is my self-imposed limit- that point at which my shoulders and mind are tired enough to make continuing on less safe for something as strenuous as chain-sawing. On this day, however, the third tank and four more hours of labor had gotten me to where I needed to be- at the completion of beating back decades of landscape neglect. A profusion of multiflora rose, autumn olive, privet, burning bush, Japanese barberry, bittersweet, amelopsis and other non-native invasives had overrun the borders of the ten-acre Connecticut farm now operated by Bird Conservation Research, Inc. as a field station.
To be sure, such border creep into agricultural land is largely the consequence of seed planting by native birds that disperse the fruits and seeds of exotic plants. However, such creep is not compatible with the goals of production agriculture, and our mission for the past four years has been to maximize wildlife values of landscapes within the constraints of an effectively run agricultural operation. Such borders, although wildlife-planted, are far from having the optimal vegetation composition for these locations.
Now that these borders are cut back (although the gargantuan task of turning the resulting slash into wildlife brush piles remains ahead), we are examining available options for replanting the borders with superior vegetation. The borders will shrink from their present 30-75 foot-wide swaths to a more modest but agriculturally practical 15 foot edge that is punctuated by mature trees. The understory is to be converted from invasive exotics to high wildlife value natives, like our various species of evergreens, hollies, viburnums, dogwoods, shadbushes, cherries, roses and aronias, as well as to non-invasive cultivated plants that are also favored by wildlife.
It is important to recognize that wildlife values are not confined to those species that breed on the property, but also include those conferred by species that pass through the area- notably migratory birds. Hence, plantings must have value at all seasons. Species that flower early and late, species that have persistent overwintering fruit and species that offer substantial cover, roost sites and nest sites are the types of plants to be selected.
At present, the field station is home to species that successfully use agricultural landscapes like the American Woodcock (we are presently working on banding our local population). It also serves as a migratory stopover (and possibly incipient nesting population) to such typically Midwestern species as the Vesper Sparrow (territorial males in early spring), Savannah Sparrow and Clay-colored Sparrow (present spring and fall).
|American Woodcocks nest and hatch young well before the haying season and often build nests in the edge adjacent to hayfields.|
Wednesday, February 21, 2018
|The island-dwelling Nightingale Reed-warbler of the tropical Pacific exhibits the phenomenon of gigantism.|
The next video in the AP Environmental Science topic The Living World is entitled Evolutionary Ecology. The lesson begins by examining a series of specimens of the possibly extinct Eskimo Curlew. Doing so demonstrates the existence of individual variation that cannot be accounted for by considering age or sex. This individual variation may be acted upon by natural selection to yield evolutionary change. The example of gigantism in the genetically isolated, island-dwelling Nightingale Reed-warbler is used as an example. Other species, like the unrelated Gray Catbird exhibit traits like the reed-warbler, which provides an example of convergent evolution. The video also explores coevolution- the influence of one species on the evolution of another. The video concludes by examining the concepts of r an k selection- alternative ways that reproductive strategies may evolve.
All videos in this series are open access and may be viewed through Arts and Academic Publishing. This particular one may be viewed by clicking below:
Wednesday, February 7, 2018
This infrared photo of a tidal wetland is overlain with maps of vegetation types.
The eleventh in the Living World series of videos compatible with the AP Environmental Science curriculum is entitled Landscape Ecology. The program concludes discussion of the species-area effect by extending its implications to the study of island biogeography. These issues relate to the larger issue of landscape ecology- considering the geographical scale at which ecological phenomena are studied. It concludes by relating ecology to evolution through discussion of natural selection, mutation, fitness and genetic isolation. This and all videos in this series are open access and may be viewed via Arts and Academic Publishing.
Wednesday, January 17, 2018
The now lost Cathedral Pines old growth stand in Cornwall, CT is used as an example of inappropriate forest management practices.
All videos in Arts and Academic Publishing’s environmental science video library are now available as open access materials for students and educators everywhere. We here highlight the videos in the Land and Water Resources unit.
This unit covers topics in natural resource management, such as forestry, deforestation effects, sustainable agriculture, integrated pest management, water resource management, waste management, public lands, habitat restoration and habitat remediation. Each topic is presented in a single video episode and follows the national AP Environmental Science curriculum.
All videos incorporate PowerPoint lecture notes, images from BCR’s vast photographic library and graphic displays that enhance understanding of the complex topics explored.
Tuesday, October 24, 2017
|Into the Woods, by Barbara Lussier|
Sunday, January 29, 2017
|The wet, high elevation limestone forests of Rota in the tropical Pacific are characterized by epiphytic ferns, fern allies and orchids.|
The topic of species diversity is focused upon in this next episode of a video series designed to complement the AP Environmental Science curriculum. It begins with an exploration of the scale at which diversity is considered, discussing the concepts of alpha, beta and gamma diversity. It also considers the components of diversity- species richness and species evenness.
The video then goes on to examine methods of computing diversity. It evaluates the uses and pitfalls of diversity characterization, including the loss of information that occurs by computing diversity indicies.
Still another diversity-related issue is the edge effect. The video examines how diversity responds to the boundary between habitats and how certain species are edge specialists. It also notes, however, that edges can have reduced habitat quality as well as higher rates of predator activity.
The video concludes by examining the species-area effect. It considers the phenomenon of minimum habitat size and the role of chance in the accumulation of species by virtue of area.
This and other videos in this series are produced by the publishing partner of Bird Conservation Research, Inc- Arts and AcademicPublishing.