Wyniki wyszukiwania - AGRO

1

Checklist programs in North America: current status and future prospects

100%

Dunn E. H.

The Ring

|

1995

|

tom 17

|

nr 1-2

2

Long-term change in an assemblage of North American bats: are eastern red bats declining?

86%

Winhold L., Kurta A., Foster R.

Acta Chiropterologica

|

2008

|

tom 10

|

nr 2

We examined changes in the assemblage of bats in southern Lower Michigan, USA, using results of paired netting surveys conducted with similar techniques but separated by 12–26 years. Species diversity declined by 18–35% and evenness decreased by 0–35% throughout the region and in two specific areas. Changes in diversity and evenness were attributed primarily to decreases of 44% or more in relative abundance of the foliage-roosting eastern red bat (Lasiurus borealis). Number of L. borealis captured per net-night decreased 52–85%. The decline in relative abundance of L. borealis suggested by mist netting was supported by a 10-fold decrease over 38 years in the proportion of L. borealis that were tested for rabies by the state health laboratory. The apparent decline in L. borealis is especially alarming in light of the recent upsurge in use of wind power and the large number of L. borealis that are killed at such developments. We recommend that other previously completed surveys in eastern North America be duplicated, as one way of helping to confirm or refute the trend that we have identified.

3

Allozyme genetic distances and evolutionary relationships in marsupials of North and South America

86%

Barrantes G. E., Daleffe L.

Acta Theriologica

|

1999

|

tom 44

|

nr 3

AUozyme genetic distances and variability were studied by horizontal starch gel electrophoresis in 6 species of marsupials from North and South America representing 4 different genera. Twenty-one presumptive loci were assessed in a total of 151 specimens. Only 1 of 21 loci was found to be monomorphic in the whole sample. Phenetic and cladistic interspecific analysis coincided in rendering two sharply differentiated subgroups: one comprising species of the genus Didelphis Linnaeus, 1758 CD. marsupialis Linnaeus, 1758, D. virginiana Kerr, 1792 and D. albiventris Lund, 1840), and the other comprising Monodelphis dimidiata fWagner, 1847}, Lestodelphys halli (Thomas, 1921) and Lutreolina crassicaudata (Desmarest, 1804). No relationships between the bradytelic condition, the karyotype stability of this group, and genetic variability were found. On the other hand, the existence of species with brief life span such as Lestodelphys halli and Monodelphis dimidiata (Marmosini tribe) and species with long life span (Didelphini tribe) allowed us to test the hypothesis which correlates generation-time with genetic variability. We conclude that a general explanation for genetic variability must involve more than just generation-time,

4

Cervus canadensis and C. elaphus: North American subspecies and evaluation of clinal extremes

86%

Schonewald C.

Acta Theriologica

|

1994

|

tom 39

|

nr 4

The distinctiveness of each extant North American subspecies of C. elaphus (Linnaeus, 1758) was tested using craniometric data. To provide a context for interpretation of these data, the distinctiveness of North American C. elaphus from Eurasian C. elaphus was reassessed from existing data and conclusions tested. Morphometry variations in size, shape, and sexual dimorphism of adult crania were analyzed using combined male-female and independent male and female principal component analyses. North American subspecies do not represent natural biogeogra- phic variation as earlier presumed. Posterior classification error was highest for subspecies, but was lowest for a set of 6 Operational Taxonomic Units that recognized C. elaphus-Olympic, C. e/apftus-northern California and Oregon, C. claphus-eastern Washington, C. elaphus-Rocky mountain and Cascade mountain, C, elaphus-Sas- katchewan and Manitoba, and C. elaphus-centra\ California. Males and females differed in their sizes, shapes and affinities to other populations. Intracontinental differences in the kind and amount of sexual dimorphism reinforced the importance of measuring and contrasting male and female features in phylogeographic analyses. Use of existing nomenclature as a blind guide for comparative systematica and ecology and for conservation undermines the quality of research and conservation for C. elaphus in North America. Previous arguments for a single-species circumgiobal cline do not take into account sexual dimorphism, behavior and reproduction. Major intercontinental differences do exist between clinal extremes in behavior, in cranial size and sexual dimorphism in addition to semilethal Fi hybridization. All suggest C. elaphus and North American Cervus are different species. Whether the transition is smooth, whether stepped transitions occur, and whether "canadensis" correctly represents the species' distribution need verification.

5

New synonymy in the genus Triplax Herbst [Coleoptera: Erotylidae], with notes on the biology of Triplax californica Leconte

86%

Goodrich M. A., Skelley P. E.

Annales Zoologici

|

1997

|

tom 47

|

nr 1-2

Triplax califomica LeConte and T. antica LeConte are found to be conspecific. Both populations represent distinct, well-defined subspecies with a narrow zone where the populations freely interbreed. Data regarding fungal host relationships of this species indicate a broader host range for the adults than is known for other North American Triplax.

6

Biogeographical analysis of gammaridean amphipod faunas based on their phyletic classification

86%

Bousfield E. L.

Polskie Archiwum Hydrobiologii

|

2000

|

tom 47

|

nr 3-4

7

Paleoecologic and taphonomic patterns derived from correspondence analysis of zooarcheological and paleontological faunal samples, a case study from the North American prairie-forest ecotone

86%

Semken H. A., Graham R. W.

Acta Zoologica Cracoviensia

|

1996

|

tom 39

|

nr 1

8

New combination in Helianthopsis [Asteraceae, Heliantheae]

86%

Sala C. A., Echarte A. M.

Fragmenta Floristica et Geobotanica

|

1996

|

tom 41

|

nr 2

9

A new species of short-winged Triphleba Rondani [Phoridae: Diptera] from North America

86%

Disney R. H. L.

Fragmenta Faunistica

|

2002

|

tom 45

|

nr 2

10

Contribution to the knowledge of the liverworts of North America

86%

Potemkin A. D.

Fragmenta Floristica et Geobotanica

|

1995

|

tom 40

|

nr 1

11

Miscellaneous notes on the genus Sphagnum [Musci, Sphagnaceae]. 7

86%

Crum H.

Fragmenta Floristica et Geobotanica

|

1995

|

tom 40

|

nr 1

12

Factors controlling the evolution of salinity, productivity and ecological stability of eutrophic lakes in cenral North America. (A summary)

72%

Barica J.

Seria Biologiczna. Uniwersytet im. Adama Mickiewicza w Poznaniu

|

1990

|

tom 43

13

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Cercopagis pengoi as an invasive species

72%

Gutkowska A., Paturej E.

Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

|

2010

|

tom 14

The fishhook waterflea (Cercopagis pengoi) native to the Ponto-Caspian region, is an excellent example of an invasive species. Within one decade from its first appearance, Cercopagis pengoi has colonized nearly the entire Baltic Sea and most of the Great Lakes of North America. The species spread rapidly owing to its ecological and biological profile. The fishhook waterflea is an euryhaline organism marked by a predominance of parthenogenetic reproduction over sexual reproduction. This taxon quickly colonized inhabited ecosystems to create stable populations. The ecological and economic consequences of the species’ appearance are noticeable, but they have not been fully investigated and require further analysis.

14

Assessment of genetic diversity and relationships among grapevine cultivars originating in Central and Eastern Europe and North America using ISSR markers

72%

Lisek A., Lisek J.

Acta Scientiarum Polonorum. Hortorum Cultus

|

2019

|

tom 18

|

nr 5

The study shows genetic diversity of 38 Vitis vinifera L. cultivars and hybrids originating in North America and Europe, including cultivars selected in Poland, which have not been characterized with the use of DNA markers yet. The agrobiological features of the genotypes selected for testing indicate that they may be useful for the breeding of new cultivars and grape production. The use of 12 ISSR primers allowed to obtain 94.4% of polymorphism. The polymorphic information content (PIC) value was high and varied between 0.829 and 0.953 with an average of 0.897. The resolving power (Rp) ranged between 3.678 and 8.892 with an average of 6.347. Primers UBC 809, UBC 810, UBC 812, UBC 855, UBC 891 and UBC 810 were found to be highly effective (informative). Similarity coefficient ranged between 0.167 and 1.0, which indicates high degree of diversity of tested grape cultivars. Tested cultivars were grouped in 3 main clusters; one of them was further divided into 6 subclusters. ‘Pannonia Kincse’ and ‘Danmarpa Polonia’ were not differentiated. Phenotypic differences among those two cultivars suggest that ‘Danmarpa Polonia’ might be a clone of ‘Pannonia Kincse’ and other molecular techniques must be used to differentiate them. Morphological and agrobiological characters of cultivars support the results obtained by ISSR markers.

15

Mites of the family Zerconidae (Acari: Mesostigmata) of the Nearctic region

72%

Sikora B.

Annales Zoologici

|

2014

|

tom 64

|

nr 2

The fauna of zerconid mites (Acari: Mesostigmata: Zerconidae) of the Nearctic region is comprehensively revised. All known 69 species grouped in 26 genera occurring in the Nearctic region are examined. Five new genera are proposed: Betaechinozercon gen. nov., Neoechinozercon gen. nov., Paramixozercon gen. nov., Rafaskas gen. nov., and Whartonas gen. nov. Twelve new species are described: Amerozercon briareus sp. nov., Bakeras evansi sp. nov., Microzercon yamoriae sp. nov., Paramixozercon alaskanus sp. nov., P. aoki sp. nov., Rafaskas blaszaki sp. nov., Zercon lucidus sp. nov., Z. manitous sp. nov., Z. morazae sp. nov., Z. raveni sp. nov., Z. oregonus sp. nov., and Z. skorackii sp. nov. The following new combinations are proposed: Blaszakiella mahunkai (Ujvári, 2013) comb. nov., B. pardus (Ujvári, 2013) comb, nov., Paramixozercon jasoniana (Díaz-Aguilar et Ujvári, 2010) comb, nov., P. albertanensis (Díaz-Aguilar et Ujvári, 2010) comb, nov., P. borealis (Díaz-Aguilar et Ujvári, 2010) comb, nov., Betaechinozercon americanus (Błaszak, 1982) comb, nov., Neoblaszakiella alaskaensis (Ujvári, 2013) comb, nov., N. luiseae (Ujvári, 2013) comb, nov., N. nudus (Ujvári, 2013) comb, nov., and Whartonas krantzi (Blaszak, 1980) comb. nov. The genera, Mixozercon Halašková, 1963 and Echinozercon Błaszak, 1976 are excluded from the list of the Nearctic zerconid genera. Keys to the zerconid genera and all Nearctic species are provided. Main aspects of the zoogeography of the family Zerconidae are discussed.

16

Estimates and forecasts of forest biomass and carbon sequestration in North America and Australia: a forty-five year quest

72%

Botkin D. B., Ngugi M. R., Doley D.

Drewno. Prace Naukowe. Doniesienia. Komunikaty

|

2014

|

tom 57

|

nr 192

A half-century of forest inventory research involving statistically-valid fieldmeasurements (using statistically representative sample size and showing confidence limits) and well-validated forecasting methods are reviewed in this paper. Some current procedures overestimate global and large-scale forest biomass, carbonstorage, and carbon sequestering rates because they are based on statistically-invalid methods (errors in estimates are unavailable and unreported), or they fail to consider key dynamic characteristics of forests. It is sometimes assumed that old-growth forests can serve as fixed, steady-state storage of biomass and carbon for indefinitely long periods, but it is shown by both modelling and remote sensing that forests are dynamic systems, the state of which can change considerably over as shorta time as a decade. Forecasting methods show that maximum biomass and carbon storage in some important forest types occurs in mid-succession, not in old-growth. It is proposed, therefore, that realistic biomass and carbon storage estimates used for carbon credits and offsets be determined as the statistical mean minus the confidence interval and that practical carbon sequestering programs include specific timeframes, not indefinitely long periods of time.

17

North American wild rice - rich source of nutraceuticals

72%

Klensporf-Pawlik D., Rudzinska M., Przybylski R.

Polish Journal of Food and Nutrition Sciences

|

2011

|

tom 61

|

nr Suppl.1

18

A synopsis of the milliped genus Brachycybe Wood, 1864 (Platydesmida: Andrognathidae)

72%

Shelley R., McAllister C., Tanabe T.

Fragmenta Faunistica

|

2005

|

tom 48

|

nr 2

19

Dalsze przemieszczanie sie produkcji od sklejki do plyt OSB w Ameryce Polnocnej

72%

W K.

Biuletyn Informacyjny Ośrodka Badawczo-Rozwojowego Przemysłu Płyt Drewnopochodnych w Czarnej Wodzie

|

2000

|

tom 41

|

nr 4

191-192

20

Dwa dalsze zaklady do wytwarzania plyt ze slomy

72%

W K.

Biuletyn Informacyjny Ośrodka Badawczo-Rozwojowego Przemysłu Płyt Drewnopochodnych w Czarnej Wodzie

|

2000

|

tom 41

|

nr 2-3

134

Ograniczanie wyników