Coral reefs are under increasing threat, and the loss of reef-associated fishes providing valuable ecosystem services is accelerating. The monitoring such rapid changes has become a challenge for ecologists ecosystems managers using traditional approaches like scuba divers performing underwater visual censuses (UVC) or diver operated video recording (DOV). However, use small, low-cost robots co...

Seaweed communities perform a variety of ecological services, including primary productivity supply, biological habitat construction, water purification, and acting as marine carbon sinks. The abundance seaweed is the basis for assessment services in communities. Ma’an Archipelago, adjacent to Yangtze River estuary China, an important typical island group. In this study, coastal islands Zhejian...

Tüm dünyada uygulanan avcılık yasaklarına rağmen Paracentrotus lividus türünün gonadlarına olan rağbet her geçen gün artmakta ve doğal ortamlarından sömürülen kestaneler nedeniyle denizel ekosistemlerin dengesi bozulmaktadır. Ülkemizde yerel halk tarafından besin olarak tüketilmeyen bu tür üzerinde, son yıllarda yoğun ihracat talebi bir baskısı oluşmuştur. P. avcılığının ekosistem temelli sürdü...

We report the detection of CO(3!2) emission from the submillimeter{selected hyperluminous galaxy SMM 02399{0136. This galaxy is the brightest source detected in the recent SCUBA surveys of the submillimeter sky. The optical counterpart of the submillimeter source has been identiied as a narrow-line AGN/starburst galaxy at z = 2:8. The CO emission is unresolved, < 5 00 , and is coincident in red...

We present the results of new rest-frame far-IR observations of the z\ 4.25 radio galaxy 8C 1435]635, which not only conÐrm that it contains an enormous quantity of dust (as Ðrst inferred from its millimeter-wave detection by Ivison in 1995), but also allow the Ðrst meaningful constraints to be placed on the mass of this dust and associated gas. The new measurements consist of (1) clear detecti...

We report the results of monitoring of V4334 Sgr (Sakurai’s Object) at 450μm and 850μm with scuba on the James Clerk Maxwell Telescope. The flux density at both wavelengths has increased dramatically since 2001, and is consistent with continued cooling of the dust shell in which Sakurai’s Object is still enshrouded, and which still dominates the near-infrared emission. Assuming that the dust sh...

To assess the status and changes in distribution of seagrass beds coral reefs Phu Quoc from 2005 to 2018, we utilized high-resolution multi-spectrum satellite images, aerial photographs, Google maps. We collected data three time periods: (using ASTER with 15 m resolution), 2010 SPOT5 10 2018 SENTINEL-2 resolution). also conducted an accuracy assessment 78 key sites March-April 2019, representin...