Halaman sa Tabing-Ilog: Mahalaga para sa Konserbasyon

Halaman sa Tabing-Ilog: Mahalaga para sa Konserbasyon

Published: April 30, 2026
By: Eunice Jean C. Patron
Translated by: Dr. Eizadora T. Yu

Ang riparian vegetation, o mga halamang tumutubo sa pampang ng ilog, ay mahalaga sa kalusugan ng mga ecosystem ng ilog, ngunit napakasensitibo sa mga pagbabago sa daloy ng ilog, sediment at mga kaguluhan sa lupa (land disturbance).

 

Bunganga ng ilog. (Photo credit: Dr. Enrico Replan

Sa mga tropikal na ilog tulad ng mga matatagpuan sa Pilipinas, kadalasan ay naiipon ang mga sediment at nagbabago ng kapaligiran, kaya’t mahalagang magsagawa ng baseline studies sa mga partikular na lugar. Ito ang motibasyon ni Dr. Enrico Replan ng University of the Philippines – Diliman College of Science’s Institute of Environmental Science and Meteorology (UPD-CS IESM) para pag aralan ang mga halamang tumutubo sa tabi ng Amnay River sa Occidental Mindoro at makita kung ano ang ugnayan ng kanilang distribusyon sa kapaligiran ng ilog.

 

Malawak ang sakop ng pag-aaral ni Dr. Replan- mahigit na 14 na kilometro ng downstream river corridor, na sumasaklaw sa mahigit na 509 na ektarya, kasama ang mga pampang ng ilog at kalapit na halamanan na minsan ay umaabot papaloob (inland) sa ibang lugar. Dahil dito, maaring makita ni Dr. Replan kung paano nagbabago ang mga halamanan sa mga lugar na madaling mabaha hanggang sa mga mas terrestrial parts ng riparian landscapes.

 

“Ang mga riparian areas o mga lugar sa tabi ng ilog, ay napakahalaga dahil sa kakayanan nilang makapigil ng erosyon ng lupa, magpabuti ng kalidad ng tubig, at makapagbigay ng tirahan para sa mga hayop. Sa pagdokumento o pagtala ng mga halaman naroon, nakabuo tayo ng baseline record na maaring magamit sa pag-monitor ng mga pagbabago sa kapaligiran sa hinaharap,” aniya ni Dr. Replan.

 

Kaunti at limitado ang siyentipikong dokumentasyon ng riparian vegetation ng Amnay River, sa kabila ng kahalagahan nito sa lokal na komunidad. “ Sa harap ng tumitinding pressure sa kapaligiran tulad ng land-use change at sedimentasyon, naramdaman kong importante na magtatag ng baseline ecological data,” dagdag niya, pagbibigay-diin na mahalaga ang pag-unawa sa mga halamanan sa tabi ng ilog para sa konserbasyon at sustainable management.

 

Kinukuhanan ni Dr. Replan ng litrato ang mga specimen ng halaman na kabilang sa mga espesyalisadong species sa Amnay River. (Photo credit: Dr. Enrico Replan)

Pinapakita ng pag-aaral na ito na karamihan sa halaman ay mga herbs at disturbance-tolerant na mga halaman, lalo na mga damo (Poaceae) at legumes (Fabaceae). Bihira ang mga puno at iba pang makahoy na halaman (woody plants), na makikita lamang sa mga hiwa-hiwalay na bahagi. Simple ang istrakturang vegetasyon (vegetation structure) na may kaunting layers at kalat-kalat sa kahabaan ng ilog.

 

Nag-iiba din ang mga uri ng species (species diversity) sa bawat lugar, depende sa lokal na kondisyon tulad ng katatagan ng lupa (soil stability), kapal ng halaman (vegetation cover) at lapit sa ilog. Ayon kay Dr. Replan, kapansin-pansin ang natuklasan niya na “May ilang species ng halaman na lubos na naaangkop sa paulit-ulit na pagbaha at mabuway na lupa, habang ang ilan naman ay lumalago sa mga lugar na malayo sa direktang impluwensya ng ilog. Ipinapakita ng spatial variation na ito kung paano kasensitibo at kaspesyalisado ang mga riparian ecosystems.”

 

Pinapakita rin ng kanilang pagsusuri kung gaano kalaki ang impluwensiya ng lokal na kapaligiran sa paghubog ng riparian ecosystems. Ang Amnay River ay isang malinaw na halimbawa kung paano nakakabuo ng complex at uneven plant communities ang isang sediment-influenced na tropikal na ilog. Nagpapatibay ito sa pangangailangan ng pamamahalang ekolohikal na naaangkop sa lugar, at pagkakaroon ng matibay na baseline data na magiging gabay sa konserbasyon at rehabilitasyon.

 

“Kung may mga pagbabago dahil sa natural disturbances or gawa ng mga aktibidad ng tao, may batayang magagamit ang mga susunod na mananaliksik at mga tagapagpatupad ng polisiya. Kaya ding magsilbing gabay ang impormasyon para sa mga proyektong rehabilitasyon dahil natukoy ang mga native species na angkop na angkop sa lokal na kondisyon ng ilog, bagay na esensyal para sa mabisang rehabilitasyon at konserbasyon ng saribuhay,” pagtatapos ni Dr. Replan.

 

Ang pag-aaral na “Floristic Diversity of Riparian and Associated Vegetation Along the Amnay River (The Philippines),” ay nalathala sa Plant-Environment Interactions.

 

References:

Replan, E. L. (2026). Floristic diversity of riparian and associated vegetation along the Amnay river (The Philippines). Plant-Environment Interactions, 7(1). https://doi.org/10.1002/pei3.70122

 

For interview requests and other concerns, please contact media@science.upd.edu.ph.

UP Study Maps Riverbank Plants in Occidental Mindoro

UP Study Maps Riverbank Plants in Occidental Mindoro

Published: April 30, 2026
By: Eunice Jean C. Patron

Riparian vegetation, or the plants that grow along riverbanks, is crucial for healthy river ecosystems but is sensitive to changes in river flow, sediment, and land disturbance.

 

View of the river mouth. (Photo credit: Dr. Enrico Replan)

In tropical rivers such as those in the Philippines, sediment often builds up and landscapes are frequently altered, highlighting the need for site-specific baseline studies. This motivated Dr. Enrico Replan of the University of the Philippines – Diliman College of Science’s Institute of Environmental Science and Meteorology (UPD-CS IESM) to examine the plants growing along the banks of the Amnay River in Occidental Mindoro and how their distribution relates to the river environment.


The study covers a 14-kilometer stretch of the downstream river corridor—spanning about 509 hectares, including riverbanks and nearby vegetation extending inland in some areas—allowing Dr. Replan to capture how plant communities change across flood-prone and more terrestrial parts of the riparian landscape.


“Riparian areas—those found along rivers—are very important because they help prevent soil erosion, improve water quality, and provide habitat for wildlife. By documenting the plants present, the study provided/created a baseline record that can help monitor environmental changes in the future,” he said.


There has been limited scientific documentation of the Amnay River’s riparian vegetation, despite its ecological significance to the local community. “Given increasing environmental pressures such as land-use change and sedimentation, I felt it was important to establish baseline ecological data,” he added, emphasizing that understanding the river’s plant communities is crucial for conservation and sustainable management.


Dr. Replan taking photographs of plant specimens belonging to highly specialized plant species in the Amnay River. (Photo credit: Dr. Enrico Replan)

The study reveals that most of the vegetation is made up of herbs and disturbance-tolerant plants, especially grasses (Poaceae) and legumes (Fabaceae). Trees and other woody plants were also scarce and occurred mostly in isolated patches, resulting in a simple vegetation structure with few layers and areas that were spread out and fragmented along the river.

 

Species diversity varied between sites, depending on local conditions such as soil stability and vegetation cover, as well as proximity to the river. Dr. Replan highlighted this notable finding: “Some species were highly adapted to periodic flooding and unstable soils, while others thrived further away from direct river influence. This spatial variation highlights how sensitive and specialized riparian ecosystems can be.”

 

The findings reveal how strongly riparian ecosystems are shaped by their local environment. The Amnay River offers a clear example of how sediment-influenced tropical rivers can produce complex and uneven plant communities, reinforcing the need for site-specific management and strong baseline data to guide conservation and restoration efforts.

 

The study provides a baseline picture of riparian vegetation in a sediment-affected tropical river. “If changes occur due to natural disturbances or human activities, future researchers and policymakers will have a point of comparison. The information can also guide restoration efforts by identifying native species that are well-adapted to the local river conditions, which is essential for effective rehabilitation and biodiversity conservation,” Dr. Replan concluded.

 

“Floristic Diversity of Riparian and Associated Vegetation Along the Amnay River (The Philippines),” is included in Plant-Environment Interactions, a journal featuring sound research from right across the molecular, ecological and environmental science communities, including plants and people.

 

References:

Replan, E. L. (2026). Floristic diversity of riparian and associated vegetation along the Amnay river (The Philippines). Plant-Environment Interactions, 7(1). https://doi.org/10.1002/pei3.70122

 

For interview requests and other concerns, please contact media@science.upd.edu.ph.

The DOST-ASTHRDP is looking for a Project Technical Assistant III

The DOST-ASTHRDP is looking for a Project Technical Assistant III

The UP Diliman Accelerated Science and Technology Human Resource Development Program (ASTHRDP) is looking for a Project Technical Assistant III
 
Qualifications & Skills:
– Output-oriented and self-motivated
– Can work with limited supervision
– Possesses creativity and problem-solving skills
– Has good project management, monitoring, coordination, and organization skills
– Has experience in scholarship administration and managing linkages is a plus but not required
– Proficient in MS Office and Google workspace
 
Requirements:
– Graduate of Bachelor’s degree relevant to the job
– At least one year full-time professional experience
Place of Assignment:
– National Science Complex, College of Science, UP Diliman, Quezon City
 
Requirements for Application:
1. Curriculum Vitae (CV)
2. Letter of Intent addressed to ASTHRDP Project Leader: Dean Cynthia P. Saloma, Ph.D.
 
Please submit all the requirements via email to staff.asthrdp@science.upd.edu.ph or in person at the Office of the Associate Dean for Academic Affairs (OADAA), 1st Floor, CS Admin Building
Deadline of applications on May 04, 2026 (Monday)

The CS Science in Society Program (SSP) is looking for the next STS Coordinator!

The College of Science UP Science and Society Program is looking for the next STS Coordinator!

The College of Science Science and Society Program (SSP) is looking for the next STS Coordinator!
 
Qualifications:
– Full-Time UPD faculty member
– Currently teaching STS 1
– Able to work with other faculty members
– Able to take in 2 units of administrative load
– Must not have a pending case in the University
 
Responsibilities:
– Recruitment of faculty members from different colleges and units of uP Diliman to join the teaching team (as affilitate faculty of SSP)
– Planning, coordinating, and arranging the schedules of lectures and exams for STS 1 classes
– Updating and collating all the reading materials for the course, and making these available to teachers and students when appropriate
– Formulating and preparing examination questions on topics for STS 1 lecturers who may be unable to do so
– Representing SSP in relevant GE and academic committee(s) of the College and/or University
– Coordinating with the SSP Director in the furtherance of STS implementation of UP Diliman
Interested? Submit requirements via email at ssp@science.upd.edu.ph by April 30, 2026

Congratulations Dr. Rachel June Ravago-Gotanco of the MSI!

Congratulations Dr. Myles Allen H. Zosa of the NIP!

The UP Diliman College of Science Congratulates Dr. Rachel June Ravago-Gotanco of the Marine Science Institute for winning the 2026 NAST Environmental Science Award (NESA)! ✨

The NAST Environmental Science Award aims to recognize and highlight the profound and outstanding scientific research that contribute to environmental protection and conservation efforts in the Philippines.

The CS Science in Society Program (SSP) is looking for Faculty Members: Full-Time Tenure Track and Part-Time Lecturer

The College of Science UP Science and Society Program is looking for Faculty Members: Full-Time Tenure Track and Part-Time Lecturer

The College of Science UP Science and Society Program is looking for Faculty Members: Full-Time Tenure Track and Part-Time Lecturer
 
Qualifications (Full-Time, Tenure Track):
– Must have a Doctorate degree in a Science, Technology, and Society-related field
– Must have at least one published research in a reputable journal
– Must not have a pending case in the University
– Able to work with other faculty members
– Applicants with previous teaching, mentoring, research or extension work on STS, Science Education, S&T Policy, Science Communication, History and Decolonization of Science, Culture, and Development are preferred
 
Responsibilities (Full-Time, Tenure Track):
– Teaching and development of research and learning materials for STS 1 and future graduate and extension programs of the SSP
– Mentoring and supervision of future graduate students
 
Qualifications (Part-Time Lecturer):
– Currently employed as faculty member or researcher in UP Diliman
– Able to take additional teaching load for STS 1
– With Masters or Doctorate degree
– Must not have a pending case in the University
– Previous teaching, mentoring, research of extension work on STS, Science Education, S&T Policy, Science
Communication, History and Decolonization of Science, Culture, and Development is a plus
 
Interested? Submit the requirements via email to ssp@science.upd.edu.ph by April 30, 2026 (Thursday)

Congratulations Dr. Myles Allen H. Zosa of the NIP!

Congratulations Dr. Myles Allen H. Zosa of the NIP!

The College of Science congratulates Dr. Myles Allen H. Zosa of the National Institute of Physics (NIP) for being awarded the 2025 UPAA-W Professorial Chair for his exemplary contributions to teaching, research, and service at the National Institute of Physics.

Dr. Zosa is an Assistant Professor at the NIP and the Program Coordinator of the Photonics Research Laboratory. Dr. Zosa is also currently serving as a councilor of the Samahang Pisika ng Pilipinas.

College of Science 2026 Gawad Tsanselor Awardees

College of Science 2026 Gawad Tsanselor Awardees

The College of Science congratulates three of its nominees selected as recipients of the 2026 Gawad Tsanselor Awards, UPD’s most prestigious distinction given to selected members of the UPD community who demonstrated exemplary work in their respective fields.
 
Dr. Noelynna T. Ramos of the National Institute of Geological Sciences (NIGS) and Dr. Jose Perico H. Esguerra of the National Institute of Physics (NIP) will be awarded the Gawad Tsanselor para sa Natatanging Guro Award.
 
The Plastics Research Capacity Building Initiatives of the Marine Science Institute will be awarded the Gawad Tsanselor para sa Natatanging Programang Pang-Ekstensiyon

UP Diliman Halalan 2026 Schedule of Activities

UP Diliman Halalan 2026 Call for Elections

HALALAN UPD 2026 Schedule of Activities
 
Start of Filing of Certificates of Candidacy
30th March 2026 8:00 AM
 
Deadline for Filing of Certificates of Candidacy
17th April 2026 12:00 PM
 
Release of First Official List of Candidates
22nd April 2026
 
Campaign Period
27th April 2026 4:00PM to 13th May 2026 5:00PM
 
Election Days
14th May 2026 to 15th May 2026 7:00PM
 
Election Results and Proclamation of Winners
15th May 2026 8:00 PM
 
See the full document for more details: UPD Halalan 2026 Call for Elections
 
See other relevant documents:

DOST-ASTHRDP Graduate Scholarship Application Now Open for the 1st Sem AY 2026-2027

DOST-ASTHRDP Graduate Program Applications Open for 1st Semester AY 2026-2027

Application for DOST-ASTHRDP Graduate Scholarship is now accepting applicants for the 1st Semester of AY 2026-2027!

Deadline of applications is on May 08, 2026 (Friday).
Application form link here: bit.ly/UPD-ASTHRDP_1st-26-27