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60 results for “Rapa Nui”
Data from: Island-wide characterization of agricultural production challenges the demographic collapse hypothesis for Rapa Nui (Easter Island)
<p>Communities in resource-poor areas face health, food production, sustainability, and overall survival challenges. Consequently, they are commonly featured in global debates surrounding societal collapse. Rapa Nui (Easter Island) is often used as an example of how over-exploitation of limited resources resulted in a catastrophic population collapse. A vital component of this narrative is that the rapid rise and fall of pre-contact Rapanui population growth rates was driven by the construction and overexploitation of once extensive rock gardens. However, the extent of island-wide rock gardening, while key for understanding food systems and demography, must be better understood. Here, we use shortwave infrared (SWIR) satellite imagery and machine learning to generate an islandwide estimate of rock gardening and re-evaluate prior population size models for Rapa Nui. We show that the extent of this agricultural infrastructure is substantially less than previously claimed and likely could not have supported the large population sizes that have been assumed.</p>
Data from: Island-wide characterization of agricultural production challenges the demographic collapse hypothesis for Rapa Nui (Easter Island)
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Cabeza bifronte de Rapa Nui
Esta figura tallada en piedra volcánica, representa dos rostros circulares idénticos, pero opuestos por el cuello. La figura presenta ojos protuberantes con un contorno hundido, nariz y boca. Procede de Rapa Nui o Isla de Pascua y fue traída por la corbeta O'Higgins en 1870. Source: Objaverse 1.0 / Sketchfab
Anzuelo de Rapa Nui
Anzuelo de piedra pulida procedente de Rapa Nui o Isla de Pascua. Su nombre originario es "Mangai" y era tanto un elemento de pesca como también un símbolo de autoridad y poder que también se refleja en el arte rupestre de la isla. Source: Objaverse 1.0 / Sketchfab
Mata'a de Rapa Nui
Cuchillo lítico elaborado en obsidiana. Dicha roca volcánica posee un una textura parecida al vidrio, lo cual permite que posea filos muy cortantes que podían ser utilizados como herramienta multipropósito para fines domésticos, artesanales o defensa. Procede de Rapa Nui, o Isla de Pascua y fue donado a nuestro museo por Sebastian Englert en 1948. Source: Objaverse 1.0 / Sketchfab
Rapa Nui statue scan with peel 3d
Ok, this is actually a garder reproduction on the famous easter island statue but peel 3d would work just as well on real stone. It is still pretty fantastic to see how fast ans easily you can capture the organic shape of a model like this! This would be a pretty cool thing to 3D print! You can also see how the scan was done here: https://youtu.be/xcydP6cAL3c Source: Objaverse 1.0 / Sketchfab
Data from: Prolonged drought on Rapa Nui during the decline of megalithic monument construction
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Data from: The ecology of the collapse of Rapa Nui society
<p>Collapses of food producer societies are recurrent events in prehistory and have triggered a growing concern for identifying the underlying causes of convergences/divergences across cultures around the world. One of the most studied and used as a paradigmatic case is the population collapse of the Rapa Nui society. Here, we test different hypotheses about by developing explicit population dynamic models that integrate feedbacks between climatic, demographic and ecological factors that underpinned the socio-cultural trajectory of these people. We evaluate our model outputs against a reconstruction of past population size based on archaeological radiocarbon dates from the island. The resulting estimated demographic declines of the Rapa Nui people are linked to the long-term effects of climate change on the island's carrying capacity, and in turn on the "per capita food supply".</p>
FIGURE 15. Cyphoderus manuneru n in Collembola of Rapa Nui (Easter Island) with descriptions of five endemic cave-restricted species
FIGURE 15. Cyphoderus manuneru n. sp. A‒E) Abdominal sensory fields, left side, refer to Fig. 13A. A) Abd. II. B) Abd. III, outer field. C) Abd. III, inner field. D) Abd. IV, anterior field. E) Abd. IV, posterior field. F) Trochanteral organ of hind leg. G) Forefoot complex. H) Hind foot complex. I) Dens and mucro, dorsal view, with enlargement of smaller terminal scale-like seta. J) Dens and mucro, ventral view.
FIGURE 14. Cyphoderus manuneru n in Collembola of Rapa Nui (Easter Island) with descriptions of five endemic cave-restricted species
FIGURE 14. Cyphoderus manuneru n. sp. A) Labial palpus, arrow indicates lateral process on sensillum E. B) Oval head scale. C) Bilobed head scales. D) Pore on Abd. III with associated grooves. E) Ciliated mesoseta A4 and associated smooth microseta of Abd. IV. F‒H) Sublateral, dorsal, and lateral views of mucrones, respectively. Scales are in Μm.
FIGURE 11 in Collembola of Rapa Nui (Easter Island) with descriptions of five endemic cave-restricted species
FIGURE 11. Lepidocyrtus olena. Chaetotaxy of fourth abdominal segment. Open and filled circles represent macro- and microsetae, respectively. Microsetae anterior to bothriotricha T2 and T4 are fan-shaped, as shown enlarged for setae s and D1.
FIGURE 7 in Collembola of Rapa Nui (Easter Island) with descriptions of five endemic cave-restricted species
FIGURE 7. Lateral views of whole specimens. A) Coecobrya kennethi Jordana & Baquero. B) Coecobrya aitorererere n. sp. C) Pseudosinella hahoteana n. sp. D) Seira manukio n. sp. E) Lepidocyrtus olena Christiansen & Bellinger. All scales 200 Μm. Images 7A, C and D were previously published in BioScience, 64, 711‒718 (2014).
FIGURE 6. Coecobrya aitorererere n in Collembola of Rapa Nui (Easter Island) with descriptions of five endemic cave-restricted species
FIGURE 6. Coecobrya aitorererere n. sp. A) Mesothorax, anterior lateral region; mi: microsensillum; ms: microseta. Dashed arrow points anteriorly. B‒D) Images of unguiculi showing truncate distal region. Scales = 10 Μm.
FIGURE 10. Lepidocyrtus olena. A in Collembola of Rapa Nui (Easter Island) with descriptions of five endemic cave-restricted species
FIGURE 10. Lepidocyrtus olena. A) Dorsal chaetotaxy of head. B) Chaetotaxy of labium and postlabium. Open and filled circles are coarsely ciliate and smooth setae, respectively. C) Detail of labial triangle chaetotaxy. D) Mesothorax chaetotaxy. E) Mucro and detail of mucronal spine. F) Hind foot complex. G) Second abdominal segment chaetotaxy. H) Third abdominal segment chaetotaxy, showing alternative condition of lateral setae. Open and filled circles represent macro- and microsetae, respectively, unless otherwise indicated.
FIGURE 12. Pseudosinella hahoteana n in Collembola of Rapa Nui (Easter Island) with descriptions of five endemic cave-restricted species
FIGURE 12. Pseudosinella hahoteana n. sp. A) Dorsal chaetotaxy of head. B) Fourth antennal segment, apical papilla. C) Labial triangle chaetotaxy. D) Second abdominal segment chaetotaxy. E) Third abdominal segment chaetotaxy. F) Fourth abdominal segment chaetotaxy. G) Metathoracic foot complex. H) Mucro and distal section of dens showing transition from crenulate to smooth surface. Open and closed circles represent macro- and microsetae, respectively.
FIGURE 8. Seira manukio n in Collembola of Rapa Nui (Easter Island) with descriptions of five endemic cave-restricted species
FIGURE 8. Seira manukio n. sp. A) Dorsal macroseta on dens base. B) Metathoracic claw complex. C) Distal end of dens and mucro. D) Detail of eye patch. E) Dorsal chaetotaxy of head. Open circles represent macrosetae, small filled circles microsetae. F) Chaetotaxy of labium and postlabium. Open circles represent ciliate setae, filled circles are smooth setae, and 'V' represents scales. G) Ventral face of manubrium. H) Mesothorax chaetotaxy. Inset displays alternate arrangement of setae in paratype. I) Metathorax chaetotaxy. J) Chaetotaxy of first abdominal segment.
FIGURE 4. Coecobrya aitorererere n in Collembola of Rapa Nui (Easter Island) with descriptions of five endemic cave-restricted species
FIGURE 4. Coecobrya aitorererere n. sp. A) Dorsal head chaetotaxy. B, C) Anterior ventral head chaetotaxy. D) Labial palpus. E) Labial papilla E. F) Setae of maxillary palpus. G) Labrum. H) Ant. I–III, dorsal view, and enlargement of crescentiform sensillum. I) Ant II–III, ventral view, and enlargement of sense rod in Ant. III apical organ. J) Apex of Ant. IV, and enlargements of pointed seta with double basal ring and curved sensillum with punctate convex surface.
FIGURE 2. Entomobrya manuhoko n in Collembola of Rapa Nui (Easter Island) with descriptions of five endemic cave-restricted species
FIGURE 2. Entomobrya manuhoko n. sp. A) Anterior edge of labrum. B) Labial palpus. C) Setae along labial base. D) Maxillary palpus. E) Apex of Ant. IV. F) Trochanteral organ. G) Hind foot. H) Chaetotaxy of ventral tube: an, anterior; la, lateral; po, posterior. I) Male genital plate. J) Manubrial plate region; black circles with slash represent pseudopores, two mesosetae drawn to show relative sizes. K) Mucro.
FIGURE 9. Seira manukio n in Collembola of Rapa Nui (Easter Island) with descriptions of five endemic cave-restricted species
FIGURE 9. Seira manukio n. sp., dorsal chaetotaxy. A) Second abdominal segment. B) Third abdominal segment C) Fourth abdominal segment.
FIGURE 13. Cyphoderus manuneru n in Collembola of Rapa Nui (Easter Island) with descriptions of five endemic cave-restricted species
FIGURE 13. Cyphoderus manuneru n. sp. A) Dorsal chaetotaxy of head and body. B) Ventral cephalic chaetotaxy. C) Mesochaetae. D) Lateral edge of mesonotum. E) Labrum, anterior region of head, and dorsal view of Ant. I. F) Ventral view of Ant. I. G) Dorsal view of Ant. II. H) Ventral view of Ant. II. I) Labial palpus. J) Labial papillae E (left) and B (right) showing guard seta bases. K) Head of maxilla.
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