UNACOMODELI
UNESCO - Philippine National Commission (UNACOM) Online and Digital Enabling Library and Index
The UNESCO - Philippine National Commission Online and Digital Enabling Library and Index (UNACOMODELI) aims to support UNESCO’s core mission of building peace in the minds of the people through education, science, culture, and communication.
The UNACOM Online and Digital Enabling Library and Index is developed to advance the mutual knowledge and understanding, and encourage cooperation among the nations in all branches of intellectual activity, such as the exchange of publications, objects of artistic and scientific interest, and other materials of information. UNACOMODELI will serve as UNESCO - Philippine National Commission’s institutional memory and a source of high-quality information on UNESCO - Philippine National Commission's intellectual activities (in education, natural sciences, social and human sciences, culture, and communication and information). The ultimate goal is to share knowledge and to transmit it to future generations.
Particularly, it aims to:
- Provide online access to UNESCO - Philippine National Commission publications, documents, and other materials.
- Index and promote UNESCO - Philippine National Commission-sponsored and -collaborative publications, and national committee members' and partner agencies’ publications, reports, policies, laws, legislations, articles, and other materials.
- Gather and index materials in the country that support UN Sustainable Development Goals, address the Ocean Decade challenges, and build capacity in the identification, inventorying, and safeguarding of intangible cultural heritage.
The UNACOMODELI collections include UNESCO and UNESCO - Philippine National Commission publications, speeches, press releases, capacity building materials, UNESCO - Philippine National Commission-sponsored publications, and other publications of interest to UNESCO.
📷 Credit: Gregory Piper / Ocean Image Bank 🔗
Collections in UNACOMODELI
Select a community to browse its collections.
- Education Committee - Education transforms lives
- Science and Technology (Natural Sciences) Committee - Science for a sustainable future
- Social & Human Sciences - Building inclusive and sustainable economies and societies
Recent Submissions
Physiological and ecological aspects of coral transplantation
Yap, H. T.; Alvarez, R. M.; Custodio, H. M.; Dizon, R. M. (Elsevier BV, 1998-10)
The growth and mortality of transplants of two species of scleractinian corals, Porites cylindrica Dana and P. rus Forskal (1775), were monitored over 16 months in a reef in the northwestern Philippines. Transplants were in two sizes (nubbin, ∼8 cm in length; and fist-sized, ∼8 cm in diameter) and deployed at two depths (1 and 10 m). Specimens at the shallow depth had more rapid growth than the deeper ones. Light had significant effects on coral growth while temperature, salinity, water motion and sedimentation did not. Smaller corals consistently registered greater percentage increases in size as compared to the larger ones. Small transplants of P. cylindrica showed higher percentage growth rates than those of P. rus. Contrary to expectations, there were no differences in transplant mortality due to size. Over the course of the experiment, mortality was generally confined to the shallow depth. It was brought about either by algal competition or by strong water movement.
Length and sequence variability in mitochondrial control region of the milkfish, Chanos chanos
Ravago, Rachel G.; Monje, Virginia D.; Juinio–Meñez, Marie Antonette (Springer, 2002-01-01)
Extensive length variability was observed in the mitochondrial control region of the milkfish, Chanos chanos. The nucleotide sequence of the control region and flanking regions was determined. Length variability and heteroplasmy was due to the presence of varying numbers of a 41-bp tandemly repeated sequence and a 48-bp insertion/deletion (indel). The structure and organization of the milkfish control region is similar to that of other teleost fish and vertebrates. However, extensive variation in the copy number of tandem repeats (4–20 copies) and the presence of a relatively large (48-bp) indel, are apparently uncommon in teleost fish control region sequences reported to date. High sequence variability of control region peripheral domains indicates the potential utility of selected regions as markers for population-level studies.
Root production and belowground seagrass biomass
Duarte, C. M.; Merino, M.; Agawin, N.; Uri, J.; Fortes, M. D.; Gallegos, M. E.; Marbá, N.; Hemminga, M. A. (Inter-Research Science Center, 1998)
The root and rhizome biomass of the seagrass species present in 3 mixed and 2 monospecific meadows representative of different floras (Spanish Mediterranean, Mexican Caribbean, Kenyan coast, and the South China Sea off The Philippines) was examined to test for the existence of general patterns in the distribution of their biomass in the sediments, and to test a simple approach based on age determinations to estimate root production. The thickness of the roots was scaled to the thickness of the seagrass rhizomes (r = 0.92, p < 0.001). Root and rhizome biomass were high (>100 and >200 g DW m-2, respectively) for the mixed meadows examined; these belowground structures had a projected surface area often exceeding 1m2 m-2 when roots and rhizomes were considered together, and they formed a dense web of root material comprising several hundred meters per square meter. Belowground biomass showed considerable vertical stratification within the sediments, with a tendency for the larger species to extend deeper into the sediments than smaller ones. This tendency for segregation should reduce the potential interspecific competition for sediment resources, which is likely to be greater in the uppermost layers, where the belowground biomass is more evenly distributed among species. The rate of adventitious root production on vertical shoots varied from species that produced a root on almost every node to species that produced 1 adventitious root for every 10 nodes. Root production--both on horizontal rhizomes and vertical shoots--was substantial, with the combined root production approaching, or exceeding, 1000 g DW m-2 yr-1. The resulting root turnover was quite high, with most values ranging between 2 and 10 yr-1, indicative of a characteristic turnover time of months for the root compartment. The estimates of root production derived here often exceed those of rhizome production and reach values comparable to leaf production, clearly demonstrating that root production is an important component (up to 50%) of total seagrass production.
Damage and recovery of four Philippine corals from short-term sediment burial
Wesseling, I.; Uychiaoco, A. J.; Aliño, P. M.; Aurin, T.; Vermaat, J. (Inter-Research Science Center, 1999)
Recovery of corals after full burial with littoral sediment (16% silt, 46% fine sand and 38% coarse sand; 28% CaCO3) was monitored in 2 field experiments at the reefs off Lucero, Bolinao (Pangasinan, NW Philippines), from April to May 1996. In the first experiment at 2 m depth, Porites was buried for 0, 6, 20 and 68 h; a second experiment was done at 5 m depth and 4 common taxa (Porites, Galaxea, Heliopora and Acropora) were buried for 20 h. At 2 m depth, Porites was not affected by 6 h burial compared to the controls that were not buried. Increasing burial time had increasingly more serious effects. Burial for 20 h resulted in increased discoloration of the coral tissue. After 68 h of burial, up to 90% of the tissue bleached in the first days. About 50% of this tissue disappeared subsequently and bare coral skeleton became exposed or were covered with algae. After a few weeks, however, recovery took place: the bare areas were recolonized from surrounding surviving tissue or from highly retracted polyps in the affected area. In the corals that had been buried for 20 h no more significant differences from the controls were observed after 3 wk. For those that were buried for 68h, this was the case after 4 wk. At 5 m depth, all Acropora died after the 20 h burial treatment, but the other taxa recovered in a comparable way to the Porites in the first experiment at 2 m depth. It is concluded that complete burial will cause considerable whole-colony mortality in at least Acropora, and thus may result in a permanent loss of coral taxa from reefs that are subject to such intense sedimentation events. Less sensitive taxa incur substantial damage but significant recovery was observed after a month.
Acetic acid pretreatment in agar extraction of Philippine Gelidiella acerosa (Forsskaal) Feldmann et Hamel (Rhodophyta, Gelidiales)
Roleda, M. Y.; Montaño, N. E.; Ganzon-Fortes, E. T.; Villanueva, R. D. (Walter de Gruyter GmbH, 1997)
Application of different pre-extraction treatments and extraction methods were used to isolate agar from Gelidiella acerosa. Acetic acid pretreatment entailed soaking the sample in 0.5% acetic acid for 1 hour at 16-20 °C. Alkali pretreatment entailed treatment with l N NaOH at 90°C for 1 hour and eutralization in weak acid for another hour at 16-20 °C. Native agar was extracted directly from air dried samples. One hour extraction using steam pressure at 15-2PSI and boiling at 100 °C in a water bath were applied respectively. Comparative analysis showed that the acetic acid pretreated and autoclaved sample gave the highest agar yield (29.8 ± 2.41%) and gel strength (676 ± 4 g cm"2) among the extraction methods applied. Other physico-chemical properties of acid-modified agar were measured. Relative viscosity of a 1.0% solution at 65 °C ranged from 5-70 cps. A melting temperature of 90-98 °C is comparable to that of the agars from most Gelidiales, while a gelling temperature of 42-47 °C is relatively high which is suspected to be associated with a number of chemical variables masking or altering the basic structural unit of agar. Temperature hysteresis (difference between gelling and melting temperatures) at 48—50 °C was comparable to that of Difco Bacto agar tested at 50 °C.