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Associations of benthic invertebrates from Potter Cove Antarctica were defined from photo-transects. A clear bathymetric pattern was evident, with two different communities at 15 and 30 m, and a transition area between 20 and 25 m. Using multivariate analyses, three faunal assemblages related to depth were defined and a strong association of some species, mainly predators and opportunistic necrophages, with M. Ice impact icebergs and anchor ice seems to be the major regulating factor of benthic assemblages in shallow waters. This is a preview of subscription content, log in to check access. Rent this article via DeepDyve. Reprints and Permissions. Sahade, R. Polar Biol 19, 85—91 Download citation.
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This paper focuses on the Early Pleistocene of China and Southeast Asia, where the Ailuropoda-Stegodon complex is considered to be a chronologically significant faunal association in the following period. However, the stratigraphic contexts of these local faunal complexes require clarification. Indeed, after one century of research to establish a regional biostratigraphy and in spite of the recomandations provided in the s, many geochronological surveys were undertaken in the s but many problems still exist.
With a date of 11, BP, Akrotiri Aetokremnos presented a direct challenge to this chronology. It was also the only site on Cyprus with an.
Description: This perennial fern consists of a few loose leaves that develop directly from the rootstock. Infertile leaves are more common than fertile leaves. The infertile leaves are yellowish green to medium green, hairless, and ovate in outline; they are deeply pinnatifid for the most part, although their tips are more shallowly pinnatifid, while their bases are more pinnate.
The central stalk or rachis of each infertile leaf is winged. The spreading narrow lobes of the infertile leaves are generously spaced from each other; their margins are smooth to undulate and gently roll downward. Each infertile leaf has about 8 opposite pairs of these lobes; the upper lobes are ascending, the middle lobes are widely spreading, and the lower lobes are descending.
The petioles of infertile leaves are usually shorter than their blades; they are light yellowish green to reddish brown and glabrous to slightly scaly. The infertile leaves persist all summer, but die down during the autumn in response to frost. The fertile leaves have a very different appearance. Their leaflets are contracted to form hardened structures that support the bead-like sporangia and their spores.
In outline, each fertile leaf is ellipsoid-oblongoid, forming a narrow panicle of erect contracted leaflets with sporangia on a central stalk or rachis. The fertile leaves become dark brown and persist through the winter into the following year.
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Visible from space, the Great Rift Valley runs the length of the country from north to south, its undulating hilly landscape punctuated by the sharp peaks of mountains and shimmering lakes. When not shrouded in mist, this extinct volcano provides a jaw-dropping backdrop to a classic savannah landscape grazed by megafauna. It is little wonder, therefore, that Kenya attracts over a million tourists every year — a great many of them heading out on safari.
The southern stretch of the coastline features small islands that provide crucial overwintering and feeding grounds for birds, as well as important nurseries and feeding habitat for dolphins and five species of sea turtles. In particular, the degeneration of the vast rangelands through over-grazing especially by increasing numbers of sheep and goats is jeopardising the future of local pastoralist lifestyles, and undermining a traditional form of land use in which pastoralists and wildlife have been able to co-exist.
Kenya is located in Africa.
A reinterpretation of the Pleistocene human and faunal association at Las. Buitreras In an effort to date the Pleistocene faunal remains, one of the horse teeth.
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Canadian Journal of Earth Sciences
plant and animal species have been recorded in Kenya to date. 8%. of Kenya’s land is currently protected for wildlife conservation.
Sometimes only one method is possible, reducing the confidence researchers have in the results. Kidding aside, dating a find is crucial for understanding its significance and relation to other fossils or artifacts. Methods fall into one of two categories: relative or absolute. Before more precise absolute dating tools were possible, researchers used a variety of comparative approaches called relative dating.
These methods — some of which are still used today — provide only an approximate spot within a previously established sequence: Think of it as ordering rather than dating.
Benthic faunal associations on soft substrates at Potter Cove, King George Island, Antarctica
Correlation is, as mentioned earlier, the technique of piecing together the informational content of separated outcrops. When information derived from two outcrops is integrated , the time interval they represent is probably greater than that of each alone. This optimistic hope, however, must be tempered by the realization that much of the Precambrian record—older than million years—is missing.
Correlating two separated outcrops means establishing that they share certain characteristics indicative of contemporary formation. The most useful indication of time equivalence is similar fossil content, provided of course that such remains are present.
Fauna and Flora Preservation Society, Society for the Preservation of the Wild Fauna of the Empire. Fauna & Flora International (FFI) is an international conservation charity and non-governmental FFI has a long history of royal patronage dating back to Edward, Prince of Wales (later Edward VIII), who became the group’s.
Special Papers in Palaeontology , 39 , The late Cenomanian Sciponoceras gracile Zone ammonite fauna of the Britton Formation of the Eagle Ford Group in north-central Texas comprises twenty-seven species referred to seventeen genera, of which one genus and five species are new. The fauna consists of: Borissiakoceras orbiculatum Stephenson, , B.
Sowerby, , Allocrioceras dentonense Moreman, , A. Dimorphism is recognized in Placenticeras , Metoicoceras , Nannometoicoceras gen. Nannometoicoceras gen. Pteroscaphites inaffectus Crick, , Worthoceras minor sp. The faunas can be placed in the standard zonal scheme for the southern US Western Interior recognized by Cobban 1 a. In the Dallas area there is a marked unconformity just below the base of the Arcadia Park Formation, with Upper Cenomanian Sciponoceras gracile Zone Britton Formation overlain by a thin 2.
There is no evidence for the lower Collignoniceras woollgari woollgari Subzone of the C. To the north of Dallas, the top of the Eagle Ford extends to the P. The Palaeontological Association. My Account.
Working in tandem with landowners, government and sport hunters, the Society helped pass legislation which controlled hunting in vast stretches of East Africa and South Africa. In , The Guardian published an article that FFI was embroiled in a row with ethnic Karen people in Myanmar over plans to protect up to , acres of pristine forest from poachers, loggers and palm oil companies. In , FFI called on governments worldwide to adopt a moratorium on all deep sea mining , citing its impact on marine life.
The logo of the society is the Arabian oryx , after the very successful Operation Oryx , a flagship Arabian oryx captive breeding project undertaken by the society. From Wikipedia, the free encyclopedia.
The stratigraphic limits and sequence of faunal associations are new data on stratigraphy, taxonomic diversity, and methods of dating.
These dates therefore imply that the Pleistocene human occupation of the site consists of a relatively late Early Upper Paleolithic or very early Middle Upper Paleolithic and a fairly late Middle Paleolithic. Stable isotope analysis of the dated samples reinforces the ecological flexibility of Late Pleistocene cave bears. The remainder of the contents of the complex cave system, however, remains poorly dated.
This situation is especially evident in the existing collections,. Nonetheless, as part of the project to securely date and analyze the Muierii human remains Soficaru. Additional galleries extend off of these main passageways and at their ends away from the modern entrance. In addition, a bear bone Ursus spelaeus? The first date may be either finite or a minimum age; if the former, it is a reasonable age for a relatively late phase of the Middle Paleolithic.
The second date only serves to establish that there were the remains of bears at least of oxygen isotope stage 3 age within the cave system, a not surprising result.
Zooarchaeology at Amarna, 20042005
Figure 1. Paleoanthropology , a subdiscipline of anthropology, is the study of extinct primates. While the majority of researchers doing this kind of work are anthropologists, paleontologists within the discipline of geology may also study fossil primates. The primary method used by paleoanthropologists is the analysis of fossil remains. However, they increasingly rely on other scientific disciplines to gain a better understanding of the environmental forces that played a role in our evolution, as well as the formation of the fossil record.
A variety of disciplines are involved in helping to reconstruct ancient environments and biological communities. Paleontologists identify ancient floral and faunal fossils. Palynologists analyze particles in ocean and lake cores, as well as pollen in terrestrial sediments see Figure 1. Taphonomists help determine how fossil assemblages were formed. In the s, Raymond Dart proposed that early hominins bipedal primates, like ourselves found in South African caves had inhabited those caves.
In addition, he interpreted puncture wounds found in some of the skulls as evidence that those hominins made and used weapons for hunting and male-male aggression.