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Exploring key drivers of forest fires in the Mole National Park of Ghana using geospatial tools
Martin Kyereh Domfeh,Nana Ekow Nkwa Sey,Amprofi Ampah Amproche,Eric Mensah Mortey,Prince Antwi‑Agyei,Emmanuel Kwesi Nyantakyi 대한공간정보학회 2023 Spatial Information Research Vol.31 No.1
Ghana’s forest and wildlife reserves are depleting at an alarming rate and hence, the Mole National Park which is considered the oldest and largest wildlife protected area in Ghana is no exception. Bush fires are a major contributor to this menace. Fire hotspot prediction and mapping using satellite data provides a better alternative to monitoring and addressing wildfires compared to the observation of smoke emission which is the conventional tool used to detect forest fires in most parts of the country. This study sought to probe into fire incidences within the park using geospatial tools with an emphasis on climatic variables and anthropogenic activities as drivers. The research shows a weak positive correlation for fire counts to climatic variables (temperature and precipitation), giving credence to human-induced factors as majorly responsible while climatic conditions serve as a background catalyst to these fire incidences. Forest fire counts and their associated burnt area statistics between 2002 and 2019 are also presented. To reduce human-induced forest fires, this study recommends several interventions to help manage the challenge of wildfires at the reserve while highlighting the essential role of GIS and remote-sensing tools in monitoring and managing wildfires within protected areas.
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Jiajia Bi,Xianlu Zeng,Ruifei Wang,Yue Zhang,Xiaoqing Han,Khamal Kwesi Ampah,Wenguang Liu 한국분자세포생물학회 2013 Molecules and cells Vol.36 No.6
Lipid rafts are related to cell surface receptor function. Integrin is a major surface receptor protein in cell adhesion and migration on the extracellular matrix (ECM). Here, we showed that lipid rafts played a critical role in human melanoma A375 cell spreading and migration on fibronectin; an important component of the ECM that interacts with 1 integrin. We found that the disruption of lipid rafts did not markedly inhibit the expression and activation of 1 integrin. By coimmunoprecipitation and mass spectrometry, we investigated the influence of lipid rafts on the 1 integrin complex and identified nucleolin as a potential lipid-raft-dependent 1-integrin-interacting protein. Upon confirmation of the interaction between 1 integrin and nucleolin, further studies revealed that nucleolin colocalized with 1 integrin in lipid rafts and raft disruption interrupted their association. In addition, knockdown of nucle-olin markedly attenuated A375 cell spreading and migration on fibronectin. Taken together, we demonstrated that nucleolin is a critical lipid-raft-dependent 1-integrin-inte-racting protein in A375 cell spreading and migration on fibronectin.
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