Nysius wekiuicola is a species of wēkiu bug (a type of seed bug in the genus Nysius) endemic to the area surrounding the summit of Mauna Kea, on the island of Hawaiʻi. It is closely related to Nysius aa, which is endemic to the summit of the neighboring Mauna Loa.
The wēkiu bug is flightless and inhabits the summit area of Mauna Kea, over 12,000 feet (3,700 m). It is named after Puʻu Wēkiu, which means "topmost hill" in the Hawaiian language, the summit peak of Mauna Kea.[2]
The summit of Mauna Kea is a bleak, cold, apparently lifeless place with cinder cones on a plateau of lava, but a number of organisms have adapted to the inhospitable environment. These include lichens, algae, mosses, insects, spiders, and other small arthropods. At least 12 species of endemic arthropods live there, and the community is largely dependent on the wind-blown insects that are deposited there.[3]
Unlike most other lygaeids, which eat seeds, the wēkiu bug has adapted to feed on insects that are blown up to the top of the mountain and die. This is not as small a resource as it might seem; snow packs at the summit are often covered with hundreds of them. When the snow melts, wēkiu bugs can be found at the edge, feeding on insects that drop out of the melting snow.[3] They have an antifreeze protein in their blood that allows them to survive at low temperatures.
The stability of wēkiu bug populations has been a matter of controversy. Development of the summit area of Mauna Kea for telescopes has adversely affected the ecology of the area, including compaction of the loose cinder and traffic from tourism. Beyond the immediate vicinity of the summit, the bugs inhabit other cones that are well removed from activity.[4]
Surveys by the University of Hawaii have shown populations to be stable, with population variations driven by precipitation on the summit area. As a result of ongoing population monitoring, a request to list the species as endangered was declined in 2011.
Studies over the last 11 years also indicate the wekiu bug has a stable population, and demonstrate that this species exhibits extreme variability in terms of annual densities at any given site, such that the normal bounds of natural population variance for this species are much wider than previously understood. Based on our review of the best available information, we no longer conclude that threats across the wekiu bug’s expanded range put the species in danger of extinction. In summary, because the wekiu bug is likely stable in numbers, the wekiu bug is more widespread than previously believed, current threats are minimized and restricted within the larger range of the species, and future potential threats are monitored, we find the wekiu bug does not meet the definition of a threatened or endangered species and no longer warrants listing throughout all or a significant portion of its range. Thus, we have removed it from candidate status.[5]
The common name is also used to refer to the closely related Nysius aa, which occupies the same niche on Mauna Loa. It is even more poorly known than N. wekiuicola, but appears to be in less danger, since the summit of Mauna Loa is not under threat of development. Although it receives a large number of hikers, the area is largely made up of rocky lava rather than loose cinder, and is less vulnerable to human influence.
Nysius wekiuicola is a species of wēkiu bug (a type of seed bug in the genus Nysius) endemic to the area surrounding the summit of Mauna Kea, on the island of Hawaiʻi. It is closely related to Nysius aa, which is endemic to the summit of the neighboring Mauna Loa.
Nysius wekiuicola est une espèce d'insectes de l'ordre des hémiptères, endémique de l'île d'Hawaï.
L'holotype de Nysius wekiuicola, un mâle, mesure 3,5 mm[1]
Son nom spécifique, composé de wekiui et du suffixe latin -cola, « habitant », lui a été donné en référence au lieu de sa découverte, Wēkiu, un cône volcanique de haute altitude du volcan Mauna Kea du comté de Hawaii à Hawaï[1].
Nysius wekiuicola est une espèce d'insectes de l'ordre des hémiptères, endémique de l'île d'Hawaï.
Nysius wekiuicola is een insect dat behoort tot de Lygaeidae, en is endemisch op Mauna Kea op het eiland Hawaï.
Nysius wekiuicola wordt 0,5 cm groot, heeft geen vleugels en komt voor op de top van de vulkaan Mauna Kea, boven 3700m. Hij is genoemd naar Puu Wēkiu (hoogste heuvel in het Hawaïaans), de hoogste piek van Mauna Kea.
In tegenstelling tot de meeste andere Lygaeidae, die zaden eten, eet de soort andere (dode) insecten die de berg opgewaaid zijn. De sneeuw op de top wordt vaak bedekt door honderden insecten. Nysius wekiuicola eet insecten die uit de smeltende sneeuw vallen. Ze hebben een antivries in hun bloed dat het mogelijk maakt te overleven bij lage temperaturen.
De stabiliteit van de populatie wordt betwist. Er wordt gezegd dat de bouw van telescopen behorende bij het Mauna Kea-observatorium de ecologie van het gebied heeft beïnvloed.[1]
Nysius wekiuicola is een insect dat behoort tot de Lygaeidae, en is endemisch op Mauna Kea op het eiland Hawaï.
O Wēkiu (Nysius wekiuicola) é uma espécie rara de inseto que habita o arquipélago do Havaí; ameaçado, de acordo com ambientalistas, pela proposta de construção do telescópio TMT.[2]
Ligações externas
Peter D. Ashlock & Wayne C. Gagné (1983). «A remarkable new micropterous Nysius species from the aeolian zone of Mauna Kea, Hawaiʻi island (Hemiptera: Heteroptera: Lygaeidae)» (PDF). International Journal of Entomology. 25 (1): 47–55
O Wēkiu (Nysius wekiuicola) é uma espécie rara de inseto que habita o arquipélago do Havaí; ameaçado, de acordo com ambientalistas, pela proposta de construção do telescópio TMT.
Nysius wekiuicola
(Ashlock & Gagné, 1983)[1]
Nysius wekiuicola (лат.) — вид клопов из семейства наземников (Lygaeidae). Редкий высокогорный вид, эндемик острова Гавайи.
Мелкий (около 5 мм.) нелетающий хищный клоп. Обитает на вулкане Мауна Кеа на высотах более 3700 метров.
Был назван в честь бокового вулканического шлакового конуса Пу’уу Векиу англ. Pu'u wēkiu, что означает «верхний холм» на гавайском языке, у вершины Мауна-Кеа[2]
В отличие от большинства других представителей семейства наземники, которые питаются семенами, этот вид приспособился питаться мёртвыми насекомыми, которых задуло ветром на вершину горы. В гемолимфе клопов этого вида был обнаружен своеобразный «антифриз», позволяющим им переживать низкие температуры и снег.
Сохранение популяции клопов было предметом споров. Строительство телескопа на вершине Мауна Кеа и туризм может негативно сказываться на высокогорных экосистемах. В октябре 2011 года правительство США отказалось включить этот вид в список видов находящихся под угрозой исчезновения.
Существует другой близкородственный вид Nysius aa, который занимает ту же экологическую нишу на соседнем вулкане Мауна-Лоа.
|author= и |last= дублируют друг друга (справка)
Nysius wekiuicola (лат.) — вид клопов из семейства наземников (Lygaeidae). Редкий высокогорный вид, эндемик острова Гавайи.
