scholarly journals Aegialomys galapagoensis (Rodentia: Cricetidae)

2019 ◽  
Vol 51 (981) ◽  
pp. 92-99
Author(s):  
Joyce R Prado ◽  
Alexandre R Percequillo
Keyword(s):  
Natural Resources ◽  
Rattus Rattus ◽  
Critically Endangered ◽  
Santa Fe ◽  
International Union ◽  
Major Threat ◽  
Galapagos Archipelago ◽  
Santiago Island

Abstract Aegialomys galapagoensis (Waterhouse, 1839) is a sigmodontine rodent commonly called the Galapagos rice rat. It is a medium-sized rodent, characterized by dense, soft, yellow or copper, weakly grizzled pelage; the dorsum is grayish or brownish and the ventral pelage is pale. It is endemic to the open habitats of the Galapagos Archipelago, occurring on three islands, Santa Fé Island (Barrington Island), San Cristóbal Island (Chatham Island), and Santiago Island (James Island). Restricted populations are considered a major threat to A. galapagoensis conservation throughout most of its range, as well as competition with Rattus rattus. A. galapagoensis is listed as “Vulnerable” by the International Union for Conservation of Nature and Natural Resources, and is listed as “Critically Endangered” on the Ecuador National list.

scholarly journals Nesting Success and Nesting Height in the Critically Endangered Medium Tree Finch (Camarhynchus pauper)

Birds ◽  
2021 ◽  
Vol 2 (4) ◽  
pp. 427-444
Author(s):  
Sonia Kleindorfer ◽  
Lauren K. Common ◽  
Petra Sumasgutner
Keyword(s):  
Rattus Rattus ◽  
Nesting Success ◽  
Trophic Levels ◽  
Critically Endangered ◽  
Fledging Success ◽  
Island Endemic ◽  
Galapagos Archipelago ◽  
Black Rat ◽  
Avian Predators ◽  
Fly Larvae

When different introduced species across trophic levels (parasite, predator) invade island systems, they may pose significant threats to nesting birds. In this study, we measure nesting height and infer causes of offspring mortality in the critically endangered Medium Tree Finch (Camarhynchus pauper), an island endemic restricted to Floreana Island on the Galápagos Archipelago. Considering all nests at which a male built a nest, sang and attempted to attract a female (n = 222 nests), only 10.4% of nests produced fledglings (5% of nests had total fledging success, 5.4% of nests had partial fledging success). Of the 123 nests chosen by a female, 18.7% produced fledglings and of 337 eggs laid, 13.4% produced fledglings. Pairing success was higher for older males, but male age did not predict nesting success. All nests with chicks were infested with avian vampire fly larvae (Philornis downsi). We attributed the cause of death to avian vampire fly if chicks were found dead in the nest with fly larvae or pupae (45%) present. We inferred avian (either Asio flammeus galapagoensis or Crotophaga ani) predation (24%) if the nest was empty but dishevelled; and black rat (Rattus rattus) predation (20%) if the nest was empty but undamaged. According to these criteria, the highest nests were depredated by avian predators, the lowest nests by rats, and intermediate nests failed because of avian vampire fly larvae. In conclusion, there is no safe nesting height on Floreana Island under current conditions of threats from two trophic levels (introduced parasitic dipteran, introduced mammalian/avian predators; with Galápagos Short-Eared Owls being the only native predator in the system).

Plecturocebus caquetensis (Primates: Pitheciidae)

2021 ◽  
Vol 53 (1002) ◽  
pp. 35-42
Author(s):  
Johana Villota ◽  
Héctor E Ramírez-Chaves ◽  
Thomas R Defler
Keyword(s):  
Natural Resources ◽  
Related Species ◽  
Critically Endangered ◽  
International Union ◽  
Closely Related Species ◽  
Neotropical Primate ◽  
The Andes ◽  
Titi Monkey ◽  
Amazonian Region ◽  
Central Cordillera

Abstract Plecturocebus caquetensis (Defler, Bueno, and García, 2010) is a Neotropical primate commonly called the Caquetá titi monkey. It is small-sized with long, soft pelage of mixed coloration including grayish and buffy brown to agouti tones. It lacks the blackish or whitish band that is present on the forehead of closely related species. The tail is agouti-colored and slightly banded at its base. Endemic to the Amazonian region of Colombia with a distribution in areas near the eastern slopes of the Eastern and Central Cordillera of the Andes, P. caquetensis is confirmed in 104 localities in the departments of Cauca and Caquetá in Colombia. P. caquetensis is considered “Critically Endangered” (CR) by the International Union for Conservation of Nature and Natural Resources.

scholarly journals Experimental reintroduction of the threatened terrestrial orchid Diuris fragrantissima

Lankesteriana ◽  
2015 ◽  
Vol 7 (1-2) ◽  
Author(s):  
Zoe Smith ◽  
Elizabeth James ◽  
Cassandra McLean
Keyword(s):  
Urban Development ◽  
Natural Resources ◽  
Population Decline ◽  
The State ◽  
Habitat Destruction ◽  
Critically Endangered ◽  
Terrestrial Orchid ◽  
International Union

Diuris fragrantissima D. L. Jones et M. A. Clem. is a perennial terrestrial orchid endemic to the state of Victoria, Australia. The species is listed as Critically Endangered in Victoria under the criteria of the International Union for the Conservation of Nature and Natural Resources (IUCN), having suf- fered a severe population decline since the 1930s, largely attributable to habitat destruction for agricul- tural and urban development.  

scholarly journals Pengendalian Pembukaan Lahan Perkebunan Kelapa Sawit Sebagai Upaya Pelestarian Habitat Orangutan di Indonesia

2019 ◽  
Vol 2 (2) ◽  
pp. 459
Author(s):  
I Made Kusuma Arya Putra
Keyword(s):  
Natural Resources ◽  
Critically Endangered ◽  
International Union

Kelapa sawit adalah salah satu komoditas perkebunan yang berkembang pesat di Indonesia, dengan total luas lahan perkebunan seluas 11.672.861 ha pada tahun 2016. Pembukaan lahan perkebunan kelapa sawit seringkali dilakukan dengan mengalihkan fungsi lahan hutan menjadi lahan perkebunan, hingga menimbulkan berbagai dampak, mulai deforestasi hingga menjadi ancaman serius bagi keanekaragaman hayati di Indonesia, tidak terkecuali orangutan. Orangutan adalah salah satu satwa endemik indonesia yang hanya dapat ditemukan di pulau Kalimantan dan pulau Sumatera turut mengalami kerusakan habitat dan penurunan angka populasi. Berdasarkan Assessment Information yang dikeluarkan oleh IUCN (International Union for Conservation of Nature and Natural Resources) orangutan menyandang status konservasi Critically  endangered pada tahun 2016. Dalam rangka perlindungan habitat orangutan di Indonesia, pembukaan lahan perkebunan kelapa sawit tunduk pada instrumen yang diatur dalam Undang-Undang Nomor 32 Tahun 2009 tentang Perlindungan dan Pengelolaan Lingkungan Hidup dan dalam prinsip-prinsip yang diatur dalam Peraturan Menteri Pertanian Nomor 19 Tahun 2011 tentang Pedoman perkebunan Kelapa Sawit Berkelanjutan Indonesia.

scholarly journals Two new hybrids of the genus Diplazium (Athyriaceae) from Japan

PhytoKeys ◽  
2021 ◽  
Vol 172 ◽  
pp. 39-55
Author(s):  
Kiyotaka Hori ◽  
Hironobu Kanemitsu
Keyword(s):  
Natural Resources ◽  
Dna Markers ◽  
Nuclear Dna ◽  
Parental Species ◽  
Morphological Characteristics ◽  
Critically Endangered ◽  
International Union ◽  
Western Japan ◽  
Nuclear Dna Markers

In this study, we describe the ferns Diplazium × kanayamaense hyb. nov. and D. × tsukushiense hyb. nov. and further compare them to parental species D. chinense, D. deciduum and D. fauriei in terms of morphological characteristics, plastids and nuclear DNA markers. These new hybrids have been determined to be endemic to western Japan. The International Union for Conservation of Nature and Natural Resources status was evaluated for D. × kanayamaense as endangered (EN) and D. × tsukushiense as critically endangered (CR).

scholarly journals Begonia elachista Moonlight & Tebbitt sp. nov., an enigmatic new species and a new section of Begonia (Begoniaceae) from Peru

2017 ◽  
Author(s):  
Peter Watson Moonlight ◽  
Carlos Reynel ◽  
Mark Tebbitt
Keyword(s):  
New Species ◽  
Critically Endangered ◽  
International Union ◽  
Phylogenetic Affinities ◽  
Amazonian Lowlands ◽  
Iucn Criteria

The world’s smallest Begonia, Begonia elachista Moonlight & Tebbitt sp. nov., is described and illustrated from a limestone outcrop in the Amazonian lowlands of Pasco Region, Peru. It is placed within the newly described, monotypic Begonia sect. Microtuberosa Moonlight & Tebbitt sect. nov. and the phylogenetic affinities of the section are examined. Begonia elachista sp. nov. is considered Critically Endangered under the International Union for the Conservation of Nature (IUCN) criteria.

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