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Gallerani EM, Burgett J, Vaughn N, Fortini LB, Fricker GA, Mounce H, Gillespie TW, Crampton L, Knapp D, Hite JM, Gilb R. High resolution lidar data shed light on inter-island translocation of endangered bird species in the Hawaiian Islands. Ecol Appl 2023:e2889. [PMID: 37212375 DOI: 10.1002/eap.2889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 05/03/2023] [Accepted: 05/11/2023] [Indexed: 05/23/2023]
Abstract
Translocation, often a management solution reserved for at-risk species, is a highly time sensitive intervention in the face of a rapidly changing climate. The definition of abiotic and biotic habitat requirements is essential to the selection of appropriate release sites in novel environments. However, field-based approaches to gathering this information are often too time intensive, especially in areas of complex topography where common, coarse-scale climate models lack essential details. We apply a fine-scale remote sensing-based approach to study the 'akikiki (Oreomystis bairdi) and 'akeke'e (Loxops caeruleirostris), Hawaiian honeycreepers endemic to Kaua'i that are experiencing large-scale population declines due to warming-induced spread of invasive disease. We use habitat suitability modeling based on fine-scale lidar-derived habitat structure metrics to refine coarse climate ranges for these species in candidate translocation areas on Maui. We found that canopy density was consistently the most important variable in defining habitat suitability for the two Kaua'i species. Our models also corroborated known habitat preferences and behavioral information for these species that are essential for informing translocation. We estimated a nesting habitat that will persist under future climate conditions on east Maui of 23.43 km2 for 'akikiki, compared to the current Kaua'i range of 13.09 km2 . In contrast, the novel nesting range for 'akeke'e in east Maui was smaller than its current range on Kaua'i (26.29 km2 versus 38.48 km2 , respectively). We were also able to assess detailed novel competitive interactions at a fine scale using models of three endemic Maui species of conservation concern: 'ākohekohe (Palmeria dolei), Maui 'alauahio (Paroreomyza montana), and kiwikiu (Pseudonestor xanthophrys). Weighted overlap areas between the species from both islands were moderate (<12 km2 ) and correlations between Maui and Kaua'i bird habitat were generally low, indicating limited potential for competition. Results indicate that translocation to east Maui could be a viable option for 'akikiki but would be more uncertain for 'akeke'e. Our novel multi-faceted approach allows for the timely analysis of both climate and vegetation structure at informative scales for the effective selection of appropriate translocation sites for at-risk species.
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Affiliation(s)
- Erica M Gallerani
- Department of Geography, University of California Los Angeles, 1255 Bunche Hall, Box 951524, Los Angeles, CA, USA
| | - Jeff Burgett
- U.S. Fish and Wildlife Service, Science Applications, 300 Ala Moana Blvd, Honolulu, HI
| | - Nicholas Vaughn
- Center for Global Discovery and Conservation Science, Arizona State University 1001 South McAllister Avenue, Tempe, AZ
| | - Lucas Berio Fortini
- U.S. Geological Survey, Pacific Island Ecosystems Research Center Honolulu, HI
| | - Geoffrey Andrew Fricker
- Social Sciences Department, California Polytechnic University, San Luis Obispo, Building 47-13, San Luis Obispo, CA
| | - Hanna Mounce
- Maui Forest Bird Recovery Project, Pacific Cooperative Studies Unit, UH Manoa, 2465 Olinda Rd, Makawao, HI
| | - Thomas W Gillespie
- Department of Geography, University of California Los Angeles, 1255 Bunche Hall, Box 951524, Los Angeles, CA, USA
| | - Lisa Crampton
- Kauai Forest Bird Recovery Project, Pacific Cooperative Studies Unit, UH Manoa, PO Box 27, Hanapepe, HI, USA
| | - David Knapp
- Center for Global Discovery and Conservation Science, Arizona State University 1001 South McAllister Avenue, Tempe, AZ
| | - Justin M Hite
- Kauai Forest Bird Recovery Project, Pacific Cooperative Studies Unit, UH Manoa, PO Box 27, Hanapepe, HI, USA
| | - Roy Gilb
- Kauai Forest Bird Recovery Project, Pacific Cooperative Studies Unit, UH Manoa, PO Box 27, Hanapepe, HI, USA
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O'Sullivan AJ, Crampton L, Freund J, Ho KKY. F102 Route of oestrogen replacement confers distinct and divergent effects on substrate metabolism and body composition in postmenopausal women. Maturitas 1996. [DOI: 10.1016/s0378-5122(97)81064-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Hoffman DM, Crampton L, Sernia C, Nguyen TV, Ho KK. Short-term growth hormone (GH) treatment of GH-deficient adults increases body sodium and extracellular water, but not blood pressure. J Clin Endocrinol Metab 1996; 81:1123-8. [PMID: 8772586 DOI: 10.1210/jcem.81.3.8772586] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Initiation of GH treatment in adults is frequently complicated by the development of symptomatic fluid retention. To investigate the mechanism and extent of fluid retention that occurs with dosages of GH used in the treatment of GH-deficient adults, we conducted a double blind study in which seven GH-deficient patients (aged 24-74 yr) each received in random order daily sc injections of placebo, a physiological dose of GH (0.04 U/kg, low dose), and a supraphysiological dose of GH (0.08 U/kg, high dose) for 7 days, separated by 21-day washout periods. On the seventh day, measurements were made of serum insulin-like growth factor I, body weight, exchangeable sodium, plasma volume, angiotensinogen, PRA, aldosterone, atrial natriuretic peptide (ANP), and mean 24-h ambulatory heart rate and blood pressure. GH significantly increased mean insulin-like growth factor I levels from 105 +/- 11 to 304 +/- 45 micrograms/L during low dose treatment (P = 0.006) and 400 +/- 76 micrograms/L during high dose treatment (P = 0.004). High dose GH caused a 1.2 +/- 0.3 kg increase in body weight (P = 0.01) and a 193 +/- 65 mmol increase in exchangeable sodium (P = 0.008). Low dose GH had a lesser effect, with no significant increase in body weight, but an increase in exchangeable sodium of 113 +/- 37 mmol (P = 0.02). Plasma volume was not significantly affected by GH treatment. Mean supine angiotensinogen levels were significantly higher during both GH treatments compared to placebo (low dose, P = 0.017; high dose, P = 0.028) as were mean supine PRA levels (low dose, P = 0.0002; high dose, P = 0.0025). Supine angiotensin II, aldosterone, and ANP levels were not significantly affected by GH treatment. There was no significant change from placebo in any of the sodium-regulating hormones in the erect posture. The mean 24-h heart rate was significantly higher during low dose (82 +/- 2 beats/min; P = 0.0001) and high dose (88 +/- 3 beats/min; P = 0.0001) GH treatment than during placebo (67 +/- 3 beats/min). However, no significant change in mean 24-h systolic or diastolic blood pressure was observed. In summary, acute GH administration using doses currently employed in treating adults causes a dose-related increase in body weight and body sodium, but no associated increase in blood pressure. We conclude that 1) sodium retention is a physiological effect of GH, but does not cause an acute rise in blood pressure; and 2) the mechanism of sodium and fluid retention is not primarily due to enhanced aldosterone secretion or inhibition of ANP release, but more likely to a direct renal tubular effect.
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Affiliation(s)
- D M Hoffman
- Garvan Institute of Medical Research, St. Vincent's Hospital, Sydney, Australia
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